Alixcair Valverde appeals from a judgment of the United States District Court for the Eastern District of New York *132 (Frederic Block, Judge) dismissing as untimely his petition for a writ of habeas corpus filed pursuant to 28 U.S.C. § 2254. The principal question presented by this appeal is whether the confiscation of a prisoner’s draft habeas corpus petition and related legal papers by a corrections officer can justify equitable tolling of the one-year period of limitations applicable to ha-beas corpus petitions. Because we answer that question in the affirmative, we vacate the judgment of the district court and remand for further development of the facts relevant to the petitioner’s claim for equitable tolling and a decision on the basis of these additional facts as to whether the petition was timely. If the petition was timely, of course, the district court will be required to resolve it on the merits.
BACKGROUND
On March 15, 1993, Valverde was convicted of, two counts of murder in the second degree, in violation of N.Y. Penal Law § 125.25[1] and [3], one count of attempted robbery in the first degree, in violation of N.Y. Penal Law §§ 110.00 and 160.15[1], and one count of criminal possession of a weapon in the second degree, in violation of N.Y. Penal Law § 265.03. Val-verde was sentenced to concurrent prison terms of twenty-three years to life on the two murder counts and five to fifteen years on the robbery and weapon counts.
On June 5, 1995, the Appellate Division of the New York Supreme Court unanimously affirmed Valverde’s conviction.
See People v. Valverde,
On May 6, 1997, Valverde, proceeding pro se, filed a petition for a writ of habeas corpus pursuant to 28 U.S.C. § 2254. 1 In response to a motion by the respondent, the district court dismissed Valverde’s petition as time-barred because it was not filed within a “reasonable time” after the effective date of the Antiterrorism and Effective Death Penalty Act of 1996 (“AED-PA”), Pub.L. No. 104-132, 110 Stat. 1214. 2 The district court rejected Valverde’s argument that his tardiness should be excused because of his limited ability to speak and write English and his limited access to an adequate law library while in prison. The district court did not address Valverde’s additional argument that he was prevented from filing on time by a corrections officer’s confiscation of his legal papers, including his hand-written ha-beas corpus petition.
*133 On August 26, 1999, we granted Val-verde a certifícate of appealability for the limited purpose of determining whether equitable tolling might be warranted in light of the confiscation of his legal papers. This appeal followed.
DISCUSSION
I. Equitable Tolling
We have said that AEDPA’s one-year period of limitations governing habeas corpus petitions may be equitably tolled in “extraordinary or exceptional circumstances.”
Smith v. McGinnis,
The district court dismissed Valverde’s petition because it was filed on May 6, 1997, fourteen months after Valverde’s conviction became final, and twelve days after the first anniversary of the effective date of AEDPA. It is undisputed that Valverde’s petition should be regarded as untimely if the statute of limitations is not tolled for at least twelve days.
See Ross v. Artuz,
Valverde, represented by counsel on appeal, does not contest the district court’s ruling that the time for filing should not be extended because of his limited ability to communicate in English or his inadequate access to a law library. Valverde’s principal contention is that the limitations period should be equitably tolled for a period sufficient to render his filing timely because the corrections officer’s seizure of his legal papers “proximately caus[ed]” his failure to file on time.
“Equitable tolling allows courts to extend the statute of limitations beyond the time of expiration as necessary to avoid inequitable circumstances.”
Johnson v. Nyack Hosp.,
The intentional confiscation of a prisoner’s habeas corpus petition and related legal papers by a corrections officer is “extraordinary” as a matter of law.
See Morello v. James,
But assuming that these extraordinary circumstances occurred, preventing the petitioner from filing his petition for some length of time, we must still determine whether they “prevented him from filing his petition
on time.” Smith v. McGinnis,
If a petitioner demonstrates that extraordinary circumstances did prevent him from filing on time and that he or she is therefore entitled to equitable tolling, how long should the limitations period be tolled? Although “equitable tolling does not lend itself to bright-line rules,”
Fisher,
We hold that the sworn affirmation Valverde submitted to the district court was sufficient to permit him to sur *135 vive the respondent’s motion to dismiss. In his affirmation, Valverde states:
The month of April of 1997 was the very-first time I learned of the new “AED-PA” bill of 1996. After learning of this new enactment, I sought help from the law library, after being given a form pursuant to 28 U.S.C. 2254 ... [,][U]pon completion of the form, I sent it to the law library to be typed, but a Correction Officer in SHU confiscated my legal papers from another inmate in SHU and never returned them to me. It was not until the beginning of May of 97 that I was able to complete another form pursuant to 28 U.S.C. 2254 and sent it to the court.
The affirmation asserts that the confiscation of Valverde’s legal papers constituted “misconduct on the part of the Correction Officer” and that this misconduct “prevented him from filing his federal writ of habe-as corpus within the one year [period of] limitation.” There is no evidence in the record rebutting these assertions. While facts yet to be developed may bear on Valverde’s claim that the confiscation of his legal papers “prevented” him from filing his petition on time and also on the question of whether Valverde, by filing on May 6, 1997, filed soon enough, on this record the district court should have denied the respondent’s motion to dismiss.
Although Valverde’s sworn statements are adequate to counter the motion to dismiss, they are not sufficient to establish his ultimate entitlement to equitable tolling.
See, e.g., Phillips v. Donnelly,
We note that “the district court, in its discretion, may utilize any of the habeas rules designed to supplement the record without the necessity of conducting a full-blown evidentiary hearing.”
United States v. Aiello,
Finally, we note for the benefit of the district court on remand that Valverde
*136
is not ineligible for equitable tolling simply because he waited until late in the limitations period to file his habeas petition. He would have acted reasonably by filing his petition any time- during the applicable one-year period of limitations.
See Ross v. Artuz,
II. 28 U.S.C. § 2244(d)(1)(B)
Valverde argued below and argues again on appeal that his habeas petition is timely because it was filed pursuant to 28 U.S.C. § 2244(d)(1)(B). Section 2244(d)(1)(B) provides that a habeas petition by a state prisoner will be considered timely if it is filed within one year of the “date on which [an] impediment to filing an application created by State action in violation of the Constitution ... [was] removed, if the applicant was prevented from filing by such State action.” Valverde maintains that the confiscation of his legal papers was an unconstitutional impediment to filing, created by State action, that prevented him from filing on time.
The only claims we may address on this appeal are those included in the certificate of appealability.
See
28 U.S.C. § 2253(c)(3) (“The certificate of appealability ... shall indicate which specific issue or issues satisfy the showing required by paragraph (2).”);
Soto v. United States,
Section 2244(d)(1)(B) was not mentioned in the certificate of appealability we granted to Valverde. That' document states that “[t]he motion for a certificate of ap-pealability is granted for the limited purpose of determining whether equitable tolling of the limitation period in 28 U.S.C. § 2244(d) is available.” Valverde, represented by counsel subsequent to the issuance of the certificate, did not request that we reconsider the motion panel’s decision to deny him a certificate of appealability as to this issue.
Cf. Rezzonico v. H & R Block, Inc.,
CONCLUSION
For the foregoing reasons, we vacate the judgment of the district court and remand with instructions for it to develop further *137 the facts relevant to the petitioner’s claim that he was prevented from filing his petition on time by the wrongful confiscation of his petition and legal papers.
Notes
. Although there is nothing in the record that clearly establishes the date that Valverde’s petition was filed, both parties have assumed for purposes of this appeal that the date of filing was May 6, 1997, the date shown on the petition. The district court assumed the same in its unpublished memorandum and order dismissing Valverde’s petition.
. The district court relied on this Court’s statement in
Peterson v. Demskie,
. A petitioner’s own behavior (in addition to his failure to exercise reasonable diligence which is discussed in some detail below) may of course fatally undermine his claim that "rare and extraordinary” or "exceptional” circumstances warrant equitable tolling. A petitioner’s deliberate destruction of his own petition on the eve of the filing deadline, for example, "extraordinary” though it might be, would be unlikely to provide a basis for the petitioner successfully to argue that he or she was entitled to file sometime after the deadline had passed. Indeed, such behavior can be viewed as tantamount to the petitioner’s failure to exercise reasonable diligence.
. Reasonable diligence is typically a factor in an equitable tolling inquiry.
See, e.g., Sandvik
v.
United States,
. It seems unlikely that identifying the precise dates of tolling will have practical significance. We have, for example, said that “the party seeking equitable tolling must have acted with reasonable diligence throughout the period he seeks to toll,"
Smith v. McGinnis,
