¶ 1 Certiorari stands limited to whether the Court of Civil Appeals erred in affirming summary judgment for the defendants (on a dispositive theory that was interjected sua sponte ). We answer in the affirmative and remand the cause to the Court of Civil Appeals for its reconsideration of the appeal.
I
THE ANATOMY OF LITIGATION
¶2 On 4 May 1999 Brian Dale Dubuc [Dubuc, inmate or prisoner], an incarcerated inmate at Howard McLoud Correctional Center [HMCC], brought a civil rights action against five HMCC employees — Marty Sir-mons, John Richards, Wayne Morton, John Latimer and Cathy Morton — individually and in their official capacities [collectively called Sirmons, prison officials or defendants]. His claim rests on the prison officials’ actions which allegedly deprived him of meaningful access to court in his attempt to prosecute an appeal from the denial of postconviction relief in a Tulsa County case.1 The Court of Criminal Appeals dismissed that appeal as untimely.
¶ 3 Both parties moved for summary judgment.2 The trial court gave summary relief to Sirmons and overruled Dubuc’s quest. The Court of Civil Appeals [COCA] affirmed. We granted certiorari on the inmate’s petition.
Prisoner’s Claim For Postconviction Belief — The Antecedent Litigation
¶ 4 Dubuc’s unsuccessful attempt to launch an appeal from the denial of his quest for postconviction relief forms the basis of his civil rights action. While he was incarcerated at the Jess Dunn Correctional Center [JDCC], Dubuc sought postconviction relief from the District Court, Tulsa County. According to Dubuc, his quest was denied by order entered and mailed 23 February 1999, making the 30~day deadline for appealing fall on 25 March 19993 Dubuc asserts that on Friday, 19 March 1999, he had the appellate paperwork ready for transmission to the Court of Criminal Appeals, but the JDCC officials refused to process it because he was being transferred that day to the Howard McLeod Correctional Center [HMCC].
¶ 5 Upon his March 19th arrival at HMCC, Dubuc states, he advised Lt. Wayne Morton of the statutory filing deadline and requested admittance to the law library. He was denied access until the next day, Saturday, March 20. This delay prevented him from mailing his appellate paperwork until the following Monday. Dubuc spent time in the library on Saturday to finalize all the needed documents except for the in fotma pauperis affidavit. The latter had to be notarized and his account verified by prison officials. According to Dubuc, on Monday, March 22, he told two HMCC officials about his March 25 filing deadline. They had his in forma pau-peris affidavit notarized that day but could not complete the form because the critical money account information had to be obtained from JDCC, the site of his former confinement.4 Dubuc states that after he kept “badgering” the HMCC staff about whether they had received the completed form, Latimer told him “not to bother the staff or the Warden with this problem” and that the papeiwork would be done “when ‘they’ got to it.” Latimer threatened him *782with misconduct, Dnbuc claims, if he said anything else about the matter.
¶ 6 In an effort to save his appeal Dubue delivered to prison officials for mailing to the Court of Criminal Appeals his petition in error, brief, and certified trial court order Csans the pauper’s affidavit) on Tuesday, March 23. The affidavit was not included because the HMCC officials allegedly prevented him from timely obtaining the information critical for its completion. On Wednesday, March 24, Dubue asserts, an HMCC employee checked on the status of the affidavit. He had the business office fax the information and complete the form. Dubue claims that when Latimer received the affidavit on March 24, he withheld the form and did not give it back to him until the next day. Dubue states that on Thursday, March 25th he told Cathy Morton about his filing deadline and asked her to fax the documents to the Court of Criminal Appeals that day. His request was denied after she consulted with the assistant warden, John Richards. Later that day Dubue gave the in forma pauperis affidavit to prison officials for mailing to the Court of Criminal Appeals. All of Dubuc’s appellate paperwork, which had been mailed to the Court of Criminal Appeals (on March 23 and March 25), was filed by that court’s clerk 26 March 1999.
¶ 7 The Court of Criminal Appeals dismissed the appeal as untimely. The text of its order notes that postconviction relief was denied by the trial court on February 18 and that a copy of the order was mailed to Dubue on February 23. The critical trial court order is not amony the documents found in the assembled record.
Sirmons’ Aryument For Summary Adjudication.
¶ 8 According to Sirmons’ motion for summary judgment, defendant-Latimer did not (a) hold up any paperwork for Dubue, (b) deprive Dubue of any service or (c) warn him not to talk to the warden or any staff member. Sirmons claims that Dubue failed to comply with Department of Corrections [DOC] policy, which requires that an inmate furnish the facility staff with written proof of a filing deadline by 10:00 a.m. on the deadline date. To defeat Dubuc’s claim Sirmons interposed four affirmative defenses: (1) Du-buc failed to exhaust the administrative remedies mandated by the Prison Litigation Reform Act;5 (2) Dubue has not shown that he has been denied the right of access to the courts;6 (3) the defendants possess qualified immunity;7 and (4) they are protected by Eleventh Amendment immunity.8
Dubuc’s Counter-Motion for Summary Relief
¶ 9 Dubue countered that the HMCC officials were put on notice of the filing deadline on March 19 (the day of his arrival at that facility) when defendant Copeland reviewed the order denying postconvietion relief and approved the photocopies and mailing forms, rather than making him wait 48 hours as provided by DOC rules. According to Dubue, invoking the administrative grievance procedure would have been futile because that process could not secure for him a reinstatement of his dismissed appeal. Dubue asserts he should be given summary judgment on his claim because HMCC correctional officers failed in their constitutionally imposed duty to assist him in accessing the court to prevent the appeal’s dismissal.
The Court of Civil Appeals’ Affirmance
¶ 10 The Court of Civil Appeals [COCA] affirmed the trial court’s summary judgment *783for Sirmons on the sole theory (interjected sua sponte ) that Dubuc’s civil rights case rests on the erroneous conclusion that the Court of Criminal Appeals’ dismissal rested on his failure to file the in forma pauperis affidavit within the 30-day time period. COCA noted that, but for this dispositive point of law, there were fact issues that would have prevented the entry of summary judgment.9 COCA reasoned that because (a) Dubuc’s claim for relief arises from allegations that HMCC personnel caused him to miss his March 25 deadline for filing the pauper’s affidavit by inaction or delayed performance (even though he had informed them of the deadline), and (b) the Court of Criminal Appeals’ order (which declared itself sans jurisdiction solely on the ground that the petition in error was not timely filed) does not mention the pauper’s affidavit as the reason for dismissal, the prison officer’s handling of that document was simply immaterial. COCA then affirmed the summary judgment to Sirmons, concluding no doubt that Dubuc’s appeal would have been dismissed even if he had the affidavit in time.10
II
THE DISPOSITIVE ISSUE ON CERTIORARI
¶ 11 The dispositive issue on certiorari is whether the prisoner’s appeal would have failed even if the completed pauper’s affidavit had been included with the other papers (petition in error, brief and certified trial court order) which were delivered to prison officials on March 23 for mailing to the court clerk of the Court of Criminal Appeals.
¶ 12 The Posl^Conviction Procedure Act11 [Act] governs challenges to a conviction or sentence as well as appeals from the grant or denial of relief. Section 1087 of the Act provides that the critical event which triggers the appeal time is the filing of the decision in the office of the trial court’s clerk.12 A party has 30 days from the filing of the order to commence an appeal in the Court of Criminal Appeals by filing the petition in error and brief (and a certified copy of the order) in the office of the clerk of the Court of Criminal Appeals. The delivery of the appellate paperwork to prison officials is not considered effective for the § 1087 filing requirement.13 At the time of filing, *784the appealing party must pay costs14 or submit an affidavit in forma pauperis.15 The Court of Criminal Appeals deems itself without cognizance of an appeal where the pro se prisoner fails timely to comply with the statutory cost requirements.16 The presence of the pauper’s affidavit is a sine qua non of the filing’s sufficiency.17
¶ 13 There is a controversy here between the critical dates assumed by the Court of Criminal Appeals in its dismissal order and those dates which the prisoner tenders to us for the entry and mailing of the trial court’s order that denies postconviction relief. In support of his position that the trial court’s order was entered and mailed on 23 February 1999, Dubuc tendered below what appears to be an unstamped copy of the Index of Contents of the appellate record. Based on a February 23 filing date, the terminal day for filing the appeal would be March 25. The Court of Criminal Appeals, on the other hand, believed the prisoner’s appeal was out of time because, according to its dismissal order, postconviction relief was denied in the trial court on February 18 and a copy of that court’s order was mailed to Dubuc on February 23. Based on the February 18 filing date, the terminal day of the 30-day appeal time would be Saturday, March 20, which period would stand extended to Monday, March 22. It is apparent that the basis of the decision for the appeal’s dismissal was the Court of Criminal Appeals’ view that a different set of dates (from those on which the prisoner relies) governed Dubuc’s appeal time.
¶ 14 The dispositive issue before us now cannot be answered on this record. This is so because the critical trial court order that denied postconviction relief from which the appeal was brought is absent from the assembled materials in the record. There is no record proof of when the appeal time was triggered by the filing of the trial court’s adverse order which the prisoner sought to have reviewed. The latter’s text and filing date are the sole source that could inform COCA of the correct date on which the 30-day limit began to tick. Because there is no record proof warranting the adoption of Du-buc’s date of February 23, we cannot conclude that his appeal would not have failed had the authorities enabled him to include the affidavit with the papers by which he sought to commence the appeal.
¶ 15 The absence of the critical order was not fatal to the prisoner’s appeal, but its incorporation is a sine qua non of a meaningful appellate review. When the record is incomplete for lack of a critical part which may be readily procured, COCA may afford the appellant an opportunity to supplement the record nunc pro tunc before the trial court sitting as a special master.18
*785III
SUMMARY
¶ 16 We therefore hold that on this record the reason given for COCA’s affirmance of summary judgment does not support its disposition. Because COCA erroneously concluded that, as a matter of law, the in forma pauperis affidavit was immaterial to the dismissal of Dubuc’s appeal in the antecedent litigation, we return this cause to that court for another revieiv. On remand COCA (a) should afford Dubuc the opportunity to institute an authorized trial court nunc pro tunc correction proceeding19 and (b) when that is completed and the record supplemented, should then determine the dispositive issue on Dubuc’s appeal whether the appeal would have failed as untimely to review the filed trial court order even if Dubuc had included his informa pauperis affidavit with the rest of the papers that were delivered to prison officials on March 23 for filing with the clerk of -the Court of Criminal Appeals.
¶ 17 On certiorari granted upon the inmate’s petition, the Court of Civil Appeals’ opinion is vacated and the cause remanded to that court for its reconsideration of the appeal in a review to be consistent with this pronouncement.
¶ 18 WATT, V.C.J., LAVENDER, OPALA, KAUGER and BOUDREAU, JJ., concur.
¶ 19 HARGRAVE, C.J., HODGES, SUMMERS and WINCHESTER, JJ., dissent.