¶1ORDER
¶2This matter came on for hearing on the appellees' motion to dismiss the appeal on the ground that the appellant's opening brief was untimely filed. The appellees contend that the appellant has *402failed to comply with Com.R.App.Pro. 25(a).
¶3Through a series of stipulations-, the appellant obtained three extensions of time to file his opening brief. The last extension gave the appellant up to Friday, September 21, 1990, to accomplish this task.
¶4The Clerk received the appellant's opening brief by mail on Tuesday, September 25. The envelope containing the brief was postmarked September 24.
¶5In support of their motion, the appellees contend that if the brief had been mailed on September 21 it would have been postmarked that day or, at the latest, September 22. Because it was postmarked September 24, they contend that it was untimely filed.
¶6The appellant's counsel certifies that he mailed the brief by depositing it "in the U.S. mails (at the mail box at Hafa Adai Shopping Center, Garapan Village, Saipan, MP 96950), first class postage prepaid, at 11:35 p.m. on the 21st day of September, 1990, addressed to the Supreme Court, Saipan, MP 96950." He contends that Rule 25(a) permits the filing of briefs by mail and that briefs are deemed to be filed on the date of mailing if the most *403expeditious form of delivery is utilized. Asserting that the appellees' motion is frivolous, he requests that we sanction them pursuant to Com.R.App.Pro. 38(b).
¶7This motion raises two issues with respect to Rule 25(a). First, when is a brief considered mailed? Second, what should the court require as proof that the mailing of a brief was timely?
¶8The answer to the first issue is provided by the express language of Rule 25(a): "briefs shall be deemed filed on the day of mailing if the most expeditious form of delivery by mail ... is utilized." (Emphasis added.) The language plainly means
¶9With respect to the second issue, we reluctantly decline to accept the appellees' suggestion that we interpret Rule 25(a) to require a postmark as proof of timeliness. Clearly, the rule does not explicitly impose such a requirement. We believe that if this requirement is to be imposed, it should be adopted by amendment to *404the existing rule.
¶10We share the appellees' concern that in the absence of a postmark requirement, Rule 25(a) is potentially subject to abuse by dishonest litigants. However, unless the rule is amended, we shall rely upon a certification that a mailing was timely&emdash;provided that there is no clear evidence to the contrary. Relying on the veracity of the appellant's certification, we hold that the mailing of his brief was timely. The motion to dismiss is accordingly DENIED. The appellant's request for sanctions is also DENIED.
¶11Dated at Saipan, MP, this ' day of November, 1990.
¶12This rule provides:
¶13Papers required or permitted to be filed in this Court shall be filed with the Clerk. Filing may be accomplished by mail addressed to the Clerk, but filing shall not be timely unless the papers are received by the Clerk within the time fixed for filing, except that briefs shall be deemed filed on the day of mailing if the most expeditious form of delivery by mail, excepting special delivery, is utilized.
¶14The appellees also received their copy of the brief by mail on that date, bearing the same postmark.
¶15"When the language of a court rule is clear, we will not construe it contrary to its plain'meaning." Tudela v. MPLC, No. 90-011, slip op. at 5 (N.M.I. June 7, 1990).
¶16Cf. Black's Law Dictionary 858 (5th ed. 1979) (definition of "mailed"): "[a] letter, package or other mailable matter is 'mailed' when it is properly addressed, stamped with the proper postage, and deposited in a proper place for receipt of mail."