The Board on Professional Responsibility (the Board) has recommended that respondent be suspended from practicing law in the District of Columbia for six months. The proposed discipline stems from findings by a Hearing Committee, accepted by the Board, that respondent had violated three Rules of Professional Conduct: Rule 1.15(a) (commingling and misappropriation); Rule 1.15(b) (failure to notify and deliver funds to third-party claimant); and Rule 1.17(a) (failure to designate trust or escrow account). Contrary to the determination of the Hearing Committee, however, the Board concluded that respondent’s misappropriation of client funds had not been either intentional or reckless, and it therefore rejected the Committee’s recommendation of disbarment,
see In re Addams,
Because the Board’s report and the initial briefs filed with the court reflected some uncertainty about the governing le■gal principles, we requested supplemental briefs addressing, among other things, which party bears the burden of proof on whether misappropriation of funds by an attorney carried with it sufficient features of culpability to justify the presumptive sanction of disbarment imposed by
Addams.
We remove any uncertainty in the answer our precedents give to that question and hold that the burden of proving misappropriation “resulting] from more than simple negligence,”
Addams,
I.
Respondent (hereafter Anderson) became a member of the District of Columbia Bar in 1989 and worked as an associate at a law firm doing personal injury work. Thereafter, he opened his own practice, sharing office space with another attorney who was not a member of the D.C. Bar. In the spring of 1991, Mark Calligan hired Anderson to represent him in a personal injury matter arising from an automobile accident. From March 5 through April 12 of 1991, Calligan received medical treatment from the practice of Drs. Phillips & Green for injuries suffered in the accident. Up until March 1992, Phillips & Green made repeated telephone calls to Calligan and some to Anderson about the unpaid status of bills for the> treatment. Eventually a collection agency became involved, *333 and Calligan received regular calls from it regarding the bill. In turn, he repeatedly-called Anderson and occasionally left messages at his door about the matter.
In March 1993, Anderson settled the personal injury claim for $6,500. On or about March 15, he deposited the settlement check into a checking account at Signet Bank, N.A., which was the only account he used in his practice. On March 24, 1993, Anderson presented Calligan with a settlement disbursement sheet reflecting that Anderson would receive $2,166.33 for his legal fee; $1,207.50 would be remitted to Phillips & Green for the outstanding medical bills; and Calligan would receive the balance (after deducting minor expenses) of $3,100. Although Anderson immediately paid Calligan his share, he made no payment to Phillips & Green at that time.
On or about April 2, 1993, the balance in Anderson’s checking account fell below the $1207.50 due the medical provider; it remained there for about a month. Twice more, in February and April of 1994, the balanced dipped below the obligated amount for appreciable periods. In April of 1994, Anderson contacted Phillips & Green about an unrelated matter and was told of the outstanding bill in the Calligan case, whereupon he paid the medical providers the $1207.50.
Testifying before the Hearing Committee, Anderson asserted that he had simply forgotten to make the payment to Phillips & Green following settlement. He explained that at the same time the Calligan matter was settled, he was concluding a settlement in another personal injury case for a client named James Green. On the same day he gave Calligan the settlement sheet showing intended disbursements, he purchased a cashier’s check payable to James Green for $3,700, and the following week purchased a cashier’s check for $1,090 to pay Green’s medical provider, Dr. Wyatt. Having made these payments, he mistakenly believed — until informed otherwise thirteen months later — that he had also paid Drs. Phillips & Green.
Using cashier’s checks in the above manner was part of the “system” Anderson followed generally to keep track of client funds and disbursements. As the Board recognized, this system had obvious pitfalls because “it did not permit [Anderson] to verify that he had written every check required for each client’s settlement, a defect that proved to be especially problematic when two cases were settled at the same time.” Specifically, although Anderson prepared settlement sheets listing required distributions for each case that resulted in a settlement, and made corresponding notations on the case file, he kept no separate trust or escrow account nor ledgers or books reflecting receipts and disbursements. He explained that, since he had relatively few clients, once he received a settlement check he would deposit it and then “immediately get [the] checks together [of everybody who was owed some money] and send them out,” keeping record of these transactions “in [his] head.”
Calligan testified that after the March 1993 settlement and receipt of his share, he received additional telephone calls from the collection agency telling him that the medical bill had not been paid. Between one and two months after the settlement he spoke with Phillips & Green and was told “the bill had been discharged.” In the meantime, he left messages on Anderson’s answering machine but could not remember whether in them he had said “anything more than please call me,” rather than (or in addition to) giving the reason for the call. He was positive, however, that he had never spoken with Anderson after settlement about the unpaid medical bill.
*334 The Hearing Committee found that Anderson had committed commingling and misappropriation (Rule 1.15(a)), and had failed both to notify and pay third-party claimants (Rule 1.15(b)) and to designate a trust or escrow account (Rule 1.17(a)). In concluding that the misappropriation resulted from recklessness and not simple negligence, it rejected Anderson’s defense that the failure to pay the medical bill was inadvertent. First, the Committee reasoned, his “mere explanation ... that he ‘forgot’ to pay the medical providers” was not “sufficient to establish ‘simple negligence’ under applicable precedents”; rather, his “failure to maintain any system of documentary record-keeping constitutes recklessness, which in this context stands on the same footing as knowing and intentional misappropriation.” Second, and “more importantly,” the Committee “d[id] not credit [Anderson’s] explanation of events as resulting from an honest, good faith lapse in memory.” Rather, it found that his “self-serving testimony on inadvertence and regret are not credible given the time taken to pay the medical providers and the failure to respond to Mr. Calli-gan’s payment status inquiries.”
Before the Board, Anderson excepted only to the determination of recklessness and hence the recommendation for disbarment. The Board agreed with the Committee that he had violated all three ethical rules, but rejected the Committee’s conclusion that the misappropriation was reckless. After analyzing this court’s decisions at length, the Board concluded that they do not permit a conclusion that “the lack of any system of documentary bookkeeping,” without additional circumstances in aggravation, supports a determination that misappropriation stemmed from recklessness. And, in the Board’s view, the kinds of aggravating circumstances that support such a finding were absent in this case. Second, although acknowledging its duty to defer to the Hearing Committee on questions of credibility, the Board rejected as flawed the Committee’s finding that Anderson’s claim of inadvertence was not credible. That finding, it said, was “explicitly predicated ... upon [the Committee’s] conclusion that [Anderson] had failed to respond to Calligan’s payment status inquiries over an extended period of time,” a finding that lacked substantial support because no clear and convincing evidence contradicted Anderson’s testimony “that no one reminded him about the outstanding medical provider bill after the settlement check was received.” The Board therefore found no record basis for rejecting his explanation that he had been confused and simply forgotten to make the medical payment. Since, under this court’s precedents, the Board considered Anderson’s misappropriation to have resulted only from negligence, it recommended his suspension for six months.
II.
Anderson does not dispute, and the Board and Bar Counsel are in agreement, that he engaged in commingling, failure to maintain funds in a trust account, and failure to make prompt payment of funds owed to a third party. Anderson also does not dispute the Board’s conclusion that he misappropriated funds that he was required to pay on Calligan’s behalf when the balance in his operating account fell (repeatedly) beneath the amount needed to pay the medical bills.
See, e.g., In re Micheel,
A. Principles
1. Burden of Proof
Our disciplinary cases define misappropriation as “any unauthorized use of client’s funds entrusted to [the lawyer], including not only stealing but also unauthorized temporary use for the lawyer’s own purpose, whether or not he derives any personal gain or benefit therefrom.”
In re Harrison,
the balance in [the attorney’s operating] account falls below the amount due to the client. Misappropriation in such situations is essentially a per se offense; proof of improper intent is not required.
Micheel,
In
Addams,
this court sat en banc to consider the proper sanction for misappropriation. Before us was the case of an attorney whose actions constituting misappropriation “were not the result of simple negligence but were, as he admitted], intentional.”
Bar Counsel, relying principally on
Addams,
contends that once misappropriation has been proved, the burden shifts to the attorney to persuade the Board and the court that the misconduct has “resulted from nothing more than simple negligence.” Bar Counsel derives her position from the way we phrased the presumption of disbarment in
Addams
(“disbarment will be the ... sanction
unless
it appears ... ”), as well as from her conviction that placing the burden to prove more than negligence on Bar Counsel would effectively create a “presumption” the other way—
i.e.,
of negligent or inadvertent misappropriation — -thereby “vitiatfing] the ... purpose of the strict sanction announced in
*336
Addams
” (Supp. Br. for Bar Counsel at 8). The Board disagrees. It contends that a rule of presumptive disbarment upon proof by Bar Counsel of an essentially
per se
offense, placing upon the attorney the burden to prove the lesser degree of culpability necessary to avoid that sanction, would be excessive and, equally important, inconsistent with our decisions, chiefly
In re Thompson,
As pointed out, the issue before the court in
Addams
was “the appropriate sanction for Addams’ intentional misappropriation of client funds.”
In
Thompson,
Bar Counsel had charged the attorney with “dishonest misappropriation of a Ghent’s funds” in violation of then-DR 1 — 102(A)(4) (dishonesty) and DR 9-103(A) (commingling and misappropriation).
Thompson,
whenever a lawyer takes his clients’ funds for any non-de minimis period of time without authorization and without any proper accounting for them, the law creates a rebuttable presumption that the lawyer has dishonestly misappropriated those funds, whereupon the burden of going forward with explanatory evidence shifts to the lawyer.
Id. at 221 (quoting Board Opinion). In this court, Thompson challenged that rule as effectively shifting the burden to him to prove that he had not acted dishonestly.
The court recognized that the Board had been careful to leave the burden of persuasion by clear and convincing evidence with Bar Counsel, id., but it was nonetheless concerned that, “[i]n these circumstances, a shift in the burden of explanation may blend imperceptibly with a shift in the burden of proof.” Id. at 223. The court therefore concluded “that it is neither necessary nor advisable to invoke a formal rebuttable presumption whenever Bar Counsel has proven an unauthorized taking of client funds for a non-de minimis period and without a proper accounting.” Id. at 221. It held instead
that the Board may weigh, together with all of the other evidence, an attorney’s *337 explanation for — or conversely inability to explain satisfactorily — the use of a client’s funds in deciding whether Bar Counsel has met its burden of proving dishonest misappropriation by clear and convincing evidence.
Id. It reiterated that “Bar Counsel may properly offer the inadequacy (or non-existence) of the attorney’s explanation for the use of client funds as one significant — and even decisive — factor in proving dishonest misappropriation,” id. at 222, but it limited the significance of that explanation “to circumstantial evidence which the Board may consider, along with all the other evidence, in determining whether Bar Counsel has proven dishonesty by clear and convincing evidence.” Id. at 223.
When misappropriation is alleged separately to have also constituted “dishonesty,” accordingly, Thompson makes clear that Bar Counsel retains the burden of proving that the misappropriation was of such character as to require presumptive disbarment under Addams. That is true even though the respondent’s explanation for the misconduct may be considered by the factfinder along with the other evidence in assessing the sufficiency of Bar Counsel’s case. But what if Bar Counsel does not charge the misappropriation separately as an act of dishonesty? The Board informs us that since the decision in Addams, Bar Counsel’s practice has changed and that in contrast to the former practice exemplified by Thompson of charging dishonesty for (and along with) misappropriation, Bar Counsel now regularly charges intentional or reckless misappropriation as a violation of Rule 1.15(a) only (the successor to DR 9-103(A) (misappropriation)), alleging dishonesty (Rule 8.4(c)) only when there has been separate though related conduct of that description. 2 We agree with the Board, nonetheless, that the fact that misappropriation is not alleged to have been dishonest — but rather intentional or reckless — should not mean a reallocation of the burden of proof. The Addams sanction of near-automatic disbarment for misappropriation resulting from more than negligence is a strict one; it should not be triggered, in our judgment, solely by proof by Bar Counsel — even by clear and convincing evidence — that the attorney let the funds in his operating account drop below the obligated level, leaving it to him to prove that he lacked the requisite intent or level of culpability.
Addams
itself does not imply the contrary. There we were careful to state that “disbarment would be the usual sanction for misappropriation
not involving simple negligence,”
2. Recklessness
We pointed out earlier that misappropriation “resulting from more than simple negligence,” hence subject to
Addams
disbarment, does not require proof that the attorney acted intentionally or deliberately. Although the question of sanction under
Addams
has sometimes been posed as whether the misappropriation was “in-' tentional or [instead] negligent,”
see, e.g., In re Berryman,
In
Micheel,
for example, we held that recklessness was shown by the attorney’s indiscriminate writing of checks on a commingled account, with no attempt to keep track of client funds, at a time when the attorney “knew or should have known the account was overdrawn.”
Micheel,
These and other decisions,
see Berryman,
B. Application of Principles
To establish reckless misappropriation in this case, then, Bar Counsel had to prove, by clear and convincing evidence, conduct sufficient to support an inference that Anderson purposely dealt with and used the funds owed to Phillips & Green as his own, or else that he consciously disregarded the risk that those funds would be used for unauthorized purposes. Specifically, Bar Counsel could have demonstrated recklessness by proof that Anderson engaged in a pattern or course of conduct demonstrating an unacceptable disregard for the welfare of entrusted funds, such as the indiscriminate commingling of entrusted and personal funds, the failure to track settlement proceeds, the disregard of the status of accounts into which entrusted funds were placed, or permitting the repeated overdraft condition of an account. Alternatively, it would have been sufficient for Bar Counsel to prove that Anderson failed to pay the Phillips & Green bill despite knowledge that it remained unpaid, for then the inference would be permissible— indeed, compelled — that he had chosen to use client-obligated funds for unauthorized purposes. 5
Bar Counsel failed to prove by clear and convincing evidence a pattern of conduct by Anderson manifesting a reckless disregard of his duty to safeguard the Phillips
&
Green funds. It is true that he maintained no separate trust or escrow account, and that his system of documenting client transactions essentially consisted of mak
*340
ing notations on case files, preparing a settlement sheet for receipts and disbursements after a settlement, and attempting to make all necessary distributions promptly while keeping record of them “in [his] head.” As the Board recognized, this “system” was obviously deficient and invited mistakes especially when two cases were settled at around the same time. But our decisions, by clear implication, have rejected the proposition that recklessness can be shown by inadequate record-keeping alone combined with commingling and misappropriation. In
In re Reed,
We do not minimize Anderson’s failure to maintain either a separate trust account or more than what are charitably described as makeshift records for tracking client obligations. More than twelve years ago — before respondent was even a member of the Bar — the court warned “that in future cases of even simple ‘commingling’ ” a serious disciplinary sanction would be in order.
In re Hessler,
*341
Bar Counsel argues, however, that that circumstance is present in the fact, which the Hearing Committee found, that Anderson failed to respond to reminders by the client that the medical bill remained unpaid. If in fact Anderson ignored or willfully blinded himself to such reminders, then we would have no difficulty sustaining the Committee’s determination of recklessness. But, as the Board correctly determined, that finding is not supported by substantial evidence in the record,
see In re Evans,
Bar Counsel argues, nonetheless, that the Hearing Committee made a general finding that Anderson’s explanation was not credible, and that the Board failed to give this determination the proper deference owed to the finder of fact. We take this argument seriously because of the importance our disciplinary system accords to the Hearing Committee as the first-level adjudicator and trier of the facts,
see Micheel,
First, the Committee explained that Anderson’s “self-serving testimony on inadvertence and regret are not credible given the time taken to pay the medical providers and the failure to respond to Mr. Calligan’s payment status inquiries.” We set aside the adjective (“self-serving”) because testimony by a respondent in explanation of his conduct is almost by definition self-serving. Moreover, as we have seen, the record does not support the finding that respondent ignored post-settlement inquiries by Calligan, and if nothing alerted him to the fact that his belief that he had paid the bill was mistaken, then “the time taken to pay the medical providers” has no ultimate significance. Second, the Committee’s credibility assessment gives no indication that it was based on respondent’s demeanor in testifying and responding to questions.
See In re Temple,
Because of the disagreement between the Board and the Hearing Committee on the issue of Anderson s degree of culpability, we have carefully examined the record to decide whether, in light of our precedents, his misappropriation carried with it aggravating circumstances enough to warrant the severe discipline Addams imposes. Ultimately, we agree with the Board that his misappropriation did not rise to that level, consisting essentially as it did of a single mistaken failure to pay a client obligation aggravated by commingling and inadequate record-keeping — failings which, though inexcusable, do not take it beyond negligence under our decisions.
We therefore accept the Board’s recommendation that respondent be, and he hereby is, suspended from the practice of law in the District of Columbia for six months. The time before which respondent may apply for reinstatement will commence upon his filing of the affidavit required by D.C. Bar Rule XI, § 14. See D.C. Bar Rule XI, § 16(c).
So ordered.
Notes
. As an example of such circumstances, we cited
In re Kersey,
.
Compare, e.g., In re Godfrey,
.
See, e.g., In re Reed,
. Although the standard for presumptive disbarment laid down in
Addams
is misappropriation that "resulted from more than simple negligence,” neither the Board nor Bar Counsel suggests — nor has either of them previously argued to the court, to our knowledge — that there might be an intermediate level of culpability, such as "gross negligence,” short of recklessness but which would still warrant the
Addams
sanction. In our view, further differentiating the level of fault that warrants disbarment in this manner would unnecessarily complicate the already difficult task of deciding whether misappropriation is "merely negligent” or instead intentional/reckless.
Cf., e.g., Faunteroy v. United States,
. The question whether an attorney’s misappropriation was reckless, or merely negligent, is one of "ultimate fact” — a "conclusion of law” — on which the Board makes its own determination.
Micheel,
. Bar Counsel points to the fact that Anderson allowed the non-D.C. Bar member with whom he shared office space to be a signatory on the operating account, with power to write checks after "having a conference with” Anderson about the item. While this was some additional evidence of carelessness on respondent’s part in limiting access to client funds, there was no evidence that the other attorney used the account during the period when the balances dropped below the amount due Phillips & Green, and we do not think it a sufficient aggravating factor to raise Anderson's misconduct to the level of recklessness.
. The exception is the automatic disbarment — subject only to the defense of pardon— required by D.C.Code § ll-2503(a) (1995) upon proof of a final judgment of conviction for a crime involving moral turpitude.
. The court has not had occasion to consider the scope of the Board’s internally adopted Rule 13.6 which permits it to "affirm, modify, or expand the
findings
and recommendation of the Hearing Committee” (emphasis added), but presumably that authority allows the Board only to "make additional findings of fact ... which are uncontested on the record,”
i.e.,
which do not contradict Committee findings that are supported by substantial evidence.
See In re Chang,
. The dissenting Board member found additional support for the Committee’s disbelief of Anderson in the fact that he wrote two checks for himself and/or for office expenses soon after the settlement, and that his law practice had financial difficulties. But if Anderson mistakenly but honestly believed that he had paid all of the Calligan obligations, his withdrawal of funds from the operating account to pay himself and other debts is not itself clear and convincing evidence that he intended to misuse client funds.
