L. C. Stevens appeals from the district court’s order denying his claims for injunc-tive and declaratory relief and dismissing his claims for monetary relief without prejudice. The defendants claim that because Stevens failed to file a notice of appeal within 30 days of the final judgment he is barred from proceeding with this appeal. We agree.

The district court entered a final judgment on December 19, 1980. Stevens’ Notice of Appeal and Certificate of Probable Cause were stamped by the district clerk’s office as filed on January 22, 1981, more than 30 days after the final judgment was entered. Although the Certificate of Probable Cause is stamped as received on both January 15 and January 22, 1981, there is no indication that the Notice of Appeal was received or filed before January 22. 1

The burden of proof is on Stevens to establish that this court has jurisdiction. See Walker v. Newgent, 583 F.2d 163, 166 (5th Cir. 1978), cert. denied, 441 U.S. 906, 99 S.Ct. 1994, 60 L.Ed.2d 374 (1979); United States v. Sanders, 255 F.Supp. 876, 879 (N.D.Cal. 1966). The only proof offered by Stevens to show a timely notice is a copy of a letter, dated January 4, 1981, to the Clerk *579 of the Southern District of Texas. In that letter, Stevens stated that he was enclosing a Notice of Appeal and Certificate of Probable Cause. There is, however, no verification of the date of the letter, such as a notary’s stamp or receipt from the post office. Moreover, Stevens cannot rely on a statement from the defendants as to when they received their copy of the Notice of Appeal since Stevens has stated that he was unable to mail a copy of the Notice of Appeal to the defendants. Stevens has failed to establish that his Notice of Appeal was filed before January 22, 1981, the date stamped on it by the district clerk’s office.

Because the January 22 notice of appeal is untimely, this court lacks jurisdiction.

APPEAL DISMISSED.