La. Uni. R. Ct. Appeal., 2-13
All documents and required copies to be filed in a Court of Appeal shall be legible and shall be filed with the clerk. Filing may be accomplished by personal delivery or by mail addressed to the clerk. Filing may also be accomplished by facsimile or by electronic filing, if permitted by local rule. The filing of such documents by mail shall be deemed timely when the documents are mailed on or before the due date. If the documents are received by mail on the first legal day following the expiration of the delay, there shall be a rebuttable presumption that they were timely filed. In all cases where the presumption does not apply, the timeliness of the mailing shall be shown only by an official United States postmark or cancellation stamp or by official receipt or certificate from the United States Postal Service or bonafide commercial mail services such as Federal Express or United Parcel Service, made at the time of mailing which indicates the date thereof. Any other dated stamp, such as a private commercial mail meter stamp, shall not be used to establish timeliness. The filing of such documents by facsimile or by electronic filing shall be deemed timely if the facsimile or electronic filing is received by the clerk on or before the due date.
La. Uni. R. Ct. Appeal., 2-13