Appellant Stephen A. Smith appeals his conviction by a jury of failure to appear in court, D.C.Code § 23-1327 (1989 Repl.), on the grounds that there was insufficient evidence and that the trial judge erred in admitting irrelevant evidence of the general practice of courtroom clerks. Since the written notice directed appellant to the wrong courtroom, the judge having changed courtrooms since the notice was issued, the government had to prove that appellant received timely notice of the courtroom in which he was to appear in order to meet its burden of proof that appellant had willfully failed to appear “as required.” Accordingly, we hold, consistent with the principles embodied in Federal Rule of Evidence 406, that evidence about the general practice of courtroom clerks when judges change courtrooms is properly admissible as relevant to the issue of whether appellant willfully failed to appear. We further hold, however, that for the evidence to be probative, a foundation must be established for the witness’ basis of knowledge of the general practice, and because of the absence of such a foundation, the evidence was improperly admitted.
I
The government presented two witnesses at trial. A police officer testified that appellant was arrested on May 20, 1988, for carrying a dangerous weapon. A Deputy Courtroom Clerk, Janice Allen, who was assigned to the Criminal Division of the Superior Court, testified that appellant appeared in court before Judge Burnett on June 29, 1988, and a notice to return form dated June 29, 1988, bore appellant’s name and signature, and the signature of another courtroom clerk. The form stated that appellant’s status hearing in Case No. M5903-88 would be before Judge Queen, and that he was to return to appear before Judge Queen in misdemeanor court, in courtroom 19 on the second level of the District of Columbia Superior Court at 500 Indiana Avenue, N.W., on July 18. Other entries in the trial jacket indicated that appellant did not appear before Judge Queen for the July 18, 1988, status hearing, and that a bench warrant was issued that day.
Allen also testified that on July 18, 1988, Judge Queen was presiding in courtroom 25, and not in courtroom 19, and had issued a bench warrant for appellant from courtroom 25. Allen, the clerk for courtroom 25 on that date, admitted that she did not know which judge was sitting in courtroom 19 on July 18 or whether appellant had appeared in courtroom 19 on July 18. Nor had she personally gone to look for appellant in courtroom 19 on July 18.
Over defense objection, Allen testified on redirect examination that when a judge changes courtrooms it is the general practice of courtroom clerks to post “a note or a sign ... on the front of the [former] courtroom” indicating the new courtroom *977 in which the judge is sitting. 1 In response to a question about her practice when she sees a person whose case has not been called sitting in the courtroom, Allen testified, also over defense objection, that “we generally asked them why are they here or if we can help them, do they have a case on the calendar.” Allen further testified, in response to a question about what the general practice of the courtroom clerk is for checking up on people if there has been a change in the courtroom, that “[njormally what happens is that the defense counsel or the clerk who is in the courtroom that has been changed will call and either say we have extra people here, we’re going to direct them to your courtroom, or the defense counsel himself will go up and see if he can find his client.” On recross-examination, Allen conceded that she did not know whether these practices were employed in appellant’s case, or whether a sign had been posted on the door of courtroom 19 on July 18, 1988.
To rebut Allen’s testimony about the “general practice,” appellant called Louis Kleiman, an attorney who had practiced in the Superior Court beginning in 1972. He testified that 95 percent of his practice involved criminal cases and that he was generally in court five days a week. To locate judges he relied on the daily schedule listing judges’ courtroom assignments distributed by the information center. Commenting that “[ijt’s not uncommon to have difficulties” locating judges, Kleiman testified that it was his experience that “sometimes there’s a note posted on the door that the judge moved to a different courtroom, but sometimes there’s not. So that sometimes it’s just trial and error.” Indeed, he testified that more often than not there is not a notice on the courtroom door indicating the judge’s new courtroom. 2 He also testified that, because of his heavy caseload, it was not his practice to look for his client to notify the client of the new courtroom. On cross-examination he stated that he was unaware of any court rule that required defendants to contact the Pretrial Services Agency or the courtroom where they are supposed to appear if they cannot appear in court. A certified copy of a judicial assignment sheet dated July 18, 1988, which, Kleiman and an employee of the information center identified, indicated that Judge Queen was assigned to courtroom 22 (not 25) on July 18 through 22, 1988. Kleiman, who did not know appellant, had not seen him in courtroom 19 or courtroom 22 on July 18, 1988.
Appellant testified that on June 29, he was told by a courtroom clerk of the penalties of failing to appear and he signed a notice-to-return-to-court form for July 18. He claimed that on July 18, 1988, he had reported to courtroom 19 at. 8:30 a.m., and had remained there until late morning. He saw neither a sign nor a note on the courtroom 19 door directing people to a different *978 courtroom. He did not ask the courtroom 19 clerk whether his case was scheduled, but at midday went to the Information Desk in the lobby of the courthouse to inquire where he was supposed to be and was told to go to courtroom 22. He did, and he remained there until 5:00 p.m.. Appellant admitted that he had not called the Pretrial Services Agency to inform it that he could not find Judge Queen, nor did he show the clerk in either courtrooms 19 or 22 his notice to appear slip. He claimed, however, that he had called his attorney the next day. Appellant was impeached with four prior convictions 3 and admitted that he had previously been in the District of Columbia Courthouse on five occasions in connection with four criminal cases.
II
To convict of willful failure to appear, D.C.Code § 23-1327(a), the government must prove beyond a reasonable doubt that the defendant (1) was released pending trial or sentencing, (2) was required to appear in court on a specified date or at a specified time, and (3) failed to appear, and (4) that the defendant’s failure was willful.
Trice v. United States,
This case is not the usual bail jumping case since, as the court observed in
Trice,
in most bail jumping cases the government’s proof of the first three elements of the government’s evidence is not contested.
Trice, supra
at 179. Nevertheless, it is beyond dispute that the government bears the burden of proving that the defendant willfully failed to appear after receiving notice to do so.
Id.
Indeed, the statute precisely requires the government to prove that the defendant “willfully fail[ed] to appear before any court or judicial officer
as
required_” D.C.Code § 23-1327(a) (emphasis added). Here, the prosecution was based on appellant’s failure to appear for a status hearing on July 18, 1988, before Judge Queen, who was then sitting in courtroom 25. The notice-to-return form instructed appellant to appear in courtroom 19. Our previous cases have not considered the nature of the notice that is required when the notice-to-return slip given to the defendant misstates the courtroom in which the named judge is actually presiding on the return date. However, in
Raymond, supra,
the court rejected a due process challenge to the statute, explaining that the statute creates merely a permissi
*979
ble, and not a mandatory, inference of willfulness based on the defendant’s failure to appear “at a certain place at a particular time and date.”
Accordingly, to convict appellant of willful failure to appear before Judge Queen on July 18, 1988, the government had the burden to show that appellant received timely notice to return to a certain place at a certain time, here notice that was sufficient to inform him that Judge Queen would be hearing his case in courtroom 25. While a defendant undoubtedly has an obligation to act diligently with respect to returning as required for a further court proceeding, the notice-to-return form that appellant received did not, of itself, provide appellant with sufficiently accurate or complete notice of the location of the next scheduled proceeding to guide his efforts to reappear. 7 In light of the change in location of the hearing, we disagree with the government’s position that it presented a prima facie case when it demonstrated that appellant had been released on his own recognizance after signing the particular notice-to-return slip in question. Rather, in order to make out a prima facie showing of a willful failure to appear, the government had to present, in addition, either direct evidence that appellant was personally informed of where his case was to be called, or comparable circumstantial evidence, e.g., evidence of what occurred in or around Courtroom 19 on July 18, 1988, to notify persons where Judge Queen (or some other judge) would hold the scheduled hearing. The question is whether the government may meet its burden by presenting evidence of the general practice of the courtroom clerks regarding notiee when judges change courtrooms.
A.
Under Federal Rule of Evidence 406, evidence of the routine practices of an orga *980 nization, whether corroborated or not and regardless of the availability of eyewitnesses, is admissible to show that the conduct of the organization on a particular occasion was in conformity with the routine practice. 8 In the context of Rule 406, the practice of an "organization is behavior on the part of a group which is equivalent to habit of a person, that is, an organization’s practice of responding to a particular kind of situation with a particular kind of conduct. See Notes of Advisory Committee on Proposed Rules (Notes of Advisory Committee), citing “an oft-quoted paragraph” in MoCormick on EVIDENCE § 162, at 340 (Cleary ed. 1984). 9 The heightened proba-tivity of organizational practice evidence is based on the “assumption that individuals within that organization have a tendency or propensity to conform to the routine practice of the organization.” 1A Wigmore, Evidence § 93 at 1624 n. 8 (Tillers Rev. 1983). The rationale of the rule thus appears to adopt McCormick’s characterization that the doing of habitual acts becomes “semi-automatic.” See Notes of Advisory Committee on Proposed Rules at 285. The rule rejects the requirement that evidence of routine practice of an organization be corroborated as a condition precedent to its admission in evidence on the ground that requirement relates to the sufficiency of the evidence rather than its admissibility. Id. at 286.
To prove the existence of a general practice, evidence must be offered to demonstrate the uniformity of the regular response. The party offering the evidence must proffer instances sufficient in number to warrant a finding that the habit or routine existed in fact.
See
Notes of Advisory Committee at 285-86. Thus, the Fourth Circuit has stated, in view of the “somewhat strict requirements for the proof of habit or pattern of conduct as established by both the Federal Rules of Evidence and the authorities in general,” that “[wjhile precise standards for measuring the ‘extent to which instances must be multiplied and consistency of behavior maintained in order to support an inference of habit or pattern of conduct cannot be formulated,’ it is obvious that no finding is supportable under Rule 406 ... which fails to examine critically the ‘ratio of reactions to situations.’ ”
Wilson v. Volkswagen of America, Inc.,
The cases and the commentary make clear that courts should be cautious in permitting admission of habit or pattern of conduct evidence under Rule 406 because of the danger that it may afford a basis for improper inferences, cause confusion, or operate unfairly to prejudice a party.
See Wilson v. Volkswagen of America, Inc., supra,
A further threshold requirement relates to the competence of a witness to testify about the general practice of an organization. This threshold requirement is also strictly enforced. Thus, a witness may testify regarding general practices only upon a showing that the witness has a basis of personal knowledge on which to rely. In
United States v. Quezada,
This court has not yet subscribed to the evidentiary principles set forth in Fed.R. Evid. 406,
12
nor has it addressed whether evidence of general practice or habit evidence is admissible other than in a contractual context.
In Lucas v. Auto City Parking Co.,
The nature of personal habit evidence was examined by the United States Court of Appeals for the District of Columbia Circuit in
Levin v. United States,
*983 B.
Because of the general principles discussed in the cases in this jurisdiction, we find persuasive the rationale underlying Fed.R.Evid. 406, and apply the principles embodied in the rule.
See Rogers v. United States,
The general practice of courtroom clerks when judges change courtrooms was logically relevant to whether appellant willfully failed to appear before Judge Queen.
See Reavis v. United States,
The District of Columbia, along with every other jurisdiction, requires a minimal showing of competence before a witness may testify as to any matter.
See District of Columbia v. Gandy,
Appellant objected to Allen’s testimony about the general practice of courtroom clerks on the ground that Allen lacked knowledge about what had occurred in courtroom 19 on July 18, 1988 (with respect to leaving a note on the courtroom door or speaking to persons in the courtroom). These objections missed the mark to the extent that they did not expressly challenge Allen’s competence to testify about the general practice of courtroom clerks; appellant also did not thereafter move to strike Allen’s testimony. But the colloquy between the trial judge and counsel following the defense objections indicates that the judge was alerted by the prosecutor to the fact that Allen’s testimony was being offered to show a general practice. 19 See note 1, supra. Also, it was the clear inference from the defense evidence: that since there was no uniform practice Allen could not possibly testify that there was. Thus, we do not view counsel’s statement to have been a concession either that a general practice existed or that Allen was competent to testify about the nature of the general practice.
Even assuming the trial judge provisionally allowed Allen to testify,
see
Saltz-burg & Martin, Federal Rules of EvidenCE Manual,
supra,
at 530;
cf. Gorby v. Schneider Tank Lines, Inc.,
Allen’s testimony was assuredly limited in scope and length. She described what was normally done as opposed to what was always done or what was done in appellant’s case. She did not purport to describe practices that were established by rule of court or internal operating procedures. Rather, she reported what she understood to be the practice of other clerks when judges changed courtrooms. But in the absence of any evidence about the level of her experience in the Superior Court or how she came to know what other courtroom clerks did and whether this was a routine practice of the courtrooms clerks, as distinct from happenstance, as Klei-man’s testimony suggested, a foundation had not been established for her testimony about the general practices. That appellant was free to inquire of Allen’s level of experience and to present evidence impeaching Allen’s testimony of what regularly happened — which he did through Klei-man’s testimony and the introduction of the court assignment sheet — did not relieve the government, as the proponent of Allen’s testimony, of its burden to establish a foundation for the admission of her general practice testimony. See note 18, supra.
In the absence of a foundation for her testimony, the evidence on the general practice of courtroom clerks when judges change courtrooms was not probative. Kleiman’s testimony highlighted the insufficiency of the foundation for Allen’s testimony to establish that the practices occurred with a high degree of reliability and were not wholly voluntary. The record, in short, would not support a finding by the trial judge that the practices described by Allen were the semi-automatic routine practice evidence that is contemplated by Rule 406.
See Simplex, Inc. v. Diversified Energy Systems, Inc., supra,
In sum, appellant’s failure to appear for his status hearing before Judge Queen could not, as a matter of law, be found to have been willful in the absence of evi- *986 deuce that he was timely notified of his obligation to appear there. The statutory inference of willfulness could not provide the basis for a conviction in the absence of a showing that appellant had received notice of where he was to appear. The government, to show willfulness, attempted to demonstrate that the general practice of courtroom clerks would have given him notice that Judge Queen would be hearing his case in courtroom 25. 21 Without a foundation for the basis of Allen’s knowledge of the general practice of courtroom clerks when judges change courtrooms, evidence was improperly put before the jury regarding an element of the offense which the government had the burden to prove. Without Allen’s testimony about the general practice, the government failed to meet its burden of proof to show that appellant’s failure to appear was willful.
Accordingly, the judgment is reversed and the case is remanded for a new trial. 22
Notes
. The proceedings were as follows:
REDIRECT EXAMINATION
[The prosecutor]:
Q. Ms. Allen, if — Let me rephrase that. In your knowledge as a courtroom clerk, does it ever occur that a courtroom is changed?
A. Yes.
Q. And if a courtroom is changed, do you know if some type of notice is posted?
[Defense counsel]: Objection.
THE COURT: She can ask what the practice is.
[Defense counsel]: Well, I realize that, but there is no — Unless she can testify as to what happened in this case, then I believe it would be irrelevant.
[The prosecutor]: Your Honor, that’s in general. Is it her knowledge that—
THE COURT: Well, you’re asking whether she specifically knows this on that particular day?
[The prosecutor]: No. I’m not.
THE COURT: Just in general?
[The prosecutor]: Right.
THE COURT: I will allow this question as to the practice, at this point. You will be able to go so far as that.
[The prosecutor]:
Q. Do you know what the general practice of the courtroom clerk is if a courtroom is changed?
A. The general practice of courtroom clerks when courtrooms are changed is there is a note or a sign put up on the front of the courtroom. Say for instance in this case, it would have been 19, saying that Judge Queen has moved all of her matters to Courtroom 25.
. On cross examination he elaborated that such notices as there are consist only of a piece of paper that is attached to the courtroom door with scotch tape, and that while a note might be on the door the first day that a judge had changed courtrooms it might not stay there.
. Two of the convictions were for possession of marijuana and two were for distribution of marijuana.
. Our standard of review of a claim of insufficient evidence is well settled.
See, e.g., In re A.B., 556
A.2d 645, 649 n. 8 (D.C.1989);
Ford v. United States,
. Appellant's other contentions regarding the insufficiency of the evidence border on the frivolous. Thus, he maintains that the notice to return form was deficient because it failed to state the year in which he was to return to court on July 18; that he should have been orally notified of the July 18, 1988, date at the time of his release; and that there was no evidence that the Steven Smith who signed the release notice is the same man who stood trial. While the notice form did not specify a year, appellant was not confused or prejudiced by the omission, and inasmuch as he claims he reported to courtroom 19 on July 18, 1988, the notice was sufficient to achieve its purpose. Appellant, in fact, testified that he was advised of the penalties of failing to appear, and he identified his signature as the signature appearing on the form.
.
See, e.g., Greene v. Lindsey,
. The Superior Court may wish to consider revising the form-of-release notice to make clear what a defendant must do upon arriving at the courtroom stated in the notice, and thereby avoid the evidentiary problem presented in the instant appeal. The form might provide, for example, that if a defendant's case is not called by a certain time, the defendant shall confer with the courtroom clerk and, if that does not clarify the matter of where defendant’s case is to be heard, shall promptly contact the Pretrial Services Agency. For reasons discussed infra, the Superior Court may also wish to revise the method by which public notice is given that a judge has changed courtrooms.
. Federal Rule of Evidence 406, Habit; Routine Practice, provides:
Evidence of the habit of a person or of the routine practice of an organization, whether corroborated or not and regardless of the presence of eyewitnesses, is relevant to prove that the conduct of the person or organization on a particular occasion was in conformity with the habit or routine practice.
. McCormick explains that while character and habit are "close akin,” id. § 162, at 341, character evidence is a generalized description of a person’s disposition and frowned upon by courts when introduced to demonstrate how a person acted on a particular occasion. Habit evidence, on the other hand, is more specific because it denotes a person’s regular response to a repeated situation to the point where "the doing of the habitual act may become semi-au- tomatic_” Id. § 195, at 575 (emphasis added).
.Professor Wigmore suggests:
If we conceive [habit evidence] as involving an invariable regularity of action, there can be no doubt that this fixed sequence of acts tends strongly to show the occurrence of a given instance. But in the ordinary affairs of life, a habit or custom seldom has such an invariable regularity. Hence, it is easy to see why in a given instance something that may be loosely called habit or custom should be rejected because it may not in fact have sufficient *981 regularity to make it probable that it should be carried out in every instance or in most instances. Whether or not such sufficient regularity exists must depend largely on the circumstances of each case.
1A Wigmore, Evidence, supra, § 92 at 1608-1609 (emphasis added).
. Thirty-one states have adopted a code of evidence based on the Federal Rules of Evidence. G. Joseph & S. Sai.tzburg, Evidence in America, The Federal Rules in the States, xxiii (1987). Twenty-one states have adopted Federal Rule 406 verbatim. Weinstein, Evidence 406-1, 406-23-30 (1988).
. See S. Graae and B. Fitzpatrick, the Law of Evidence in the District of Columbia — Cases and Statutes Annotated to the Federal Rules of Evidence (1989).
.
See also Howard University v. Best,
. The court distinguished
Howard v. Capital Transit Co.,
. The court quoted Chamberlayne, Modern Law of Evidence, § 3204, at 4433:
The probative force of habit, whether the question arises in a civil or criminal case, is based principally upon the fact that habitual conduct is largely free from the complicating and confusing element of volition which makes the relevancy of moral conduct merely deliberative, but, on the contrary, brings such conduct in line with the activities of the body which are under the control of the subliminal mind, i.e. are of the automatic nature, practically under the uniformity of natural law. In fact, the probative strength of habit is in proportion to the extent to which it assumes this automatic character.
. The Final Draft of Federal Rule 406 contained a subdivision (b) which stated:
(b) Method of Proof: Habit or routine practice may be proved by testimony in the form of an opinion or by specific instances of conduct sufficient in number to warrant a finding that the habit existed or that the practice was routine.
Congress deleted subdivision (b) and the House Committee on the Judiciary stated:
The Committee deleted this subdivision believing that the method of proof of habit or routine practice should be left to the courts to deal with on a case-by-case basis.
H.R.Rep. No. 93-950, 93rd Cong., 1st Sess. (1973).
. The language of Rule 406 with respect to the “routine practice of an organization” is not precise. 23 Wright a Graham, Federal Practice and Procedure, supra, § 5274, at 43-49. Professors Wright and Graham define the term to include the following elements: the conduct is of such a nature that it is unlikely that the individual instance can be recalled; it is frequently engaged in by groups; and it is fairly easy to prove (because the number of instances is large enough that doubt about a single instance does not destroy the inference that the practice existed). Id. at 46-48. The entity to which the conduct applies is to be defined, suggests Judge Weinstein, in the same terms as used to define a business under the business records exception to the hearsay rule. Id. at 49.
. Rule 701, Opinion Testimony by Lay Witnesses provides:
If the witness is not testifying as an expert, the witness’ testimony in the form of opinions or inferences is limited to those opinions or inferences which are (a) rationally based on the perception of the witness and (b) helpful to a clear understanding of the witness’ testimony or the determination of a fact in issue.
Professors Saltzburg and Martin explain:
that it is important to note that Rule 701 requires that the opinion be based on personal knowledge; the Rule is not designed to encourage speculation on the part of the witnesses concerning events that they have not perceived. Moreover, the Rule implies that the Judge may exclude opinion evidence if it is confusing or it is not helpful in clarifying the testimony of the witnesses and in understanding the facts of the case.
Saltzburg and Martin, 2 Federal Rules oe Evidence Manual, supra, at 2.
. McCormick on Evidence,
supra,
§ 10, at 24 ("The burden of laying a foundation by showing that the witness had an adequate opportunity to observe is upon the party offering the testimony. By failing to object the adversary waives the preliminary proof, but not the substance of the requirement, so that if it later appears that the witness lacked opportunity, or did not actually observe the fact, the testimony must be stricken.”).
Cf. Pyne v. Jamaica Nutrition Holdings Ltd., supra,
.
See also Punch, supra,
. This is not a case in which a defendant was simply told to appear before a named judge without specifying where the defendant was to see the judge. Here, a defendant could reasonably view the return slip as meaning that Judge Queen would at some point be in courtroom 19 on July 18, and that was where the defendant was required to report. We do not understand the government to argue to the contrary.
. No double jeopardy issue is presented.
See Lockhart v. Nelson,
