The Federal Tort Claims Act (“FTCA”), 28 U.S.C. § 2671, et seq., provides a limited waiver of sovereign immunity for certain tort claims against the United States and its agencies. Section 2675 provides unequivocally that no claim under the FTCA may be brought unless the claimant has first filed an administrative claim with the federal agency involved. This exhaustion requirement is jurisdictional and cannot be waived. Gregory v. Mitchell, 634 F.2d 199, 204 (5th Cir.1981). Plaintiff argues that a letter sent by its counsel to counsel for the FDIC on March 31, 1989 is sufficient to meet the exhaustion requirement. This argument must fail, however, because the letter in question does not meet the “sum certain” requirement. See Molinar v. United States, 515 F.2d 246 (5th Cir.1975) (<HOLDING>). The argument must also fail because the
holding that where jurisdiction was based on 28 usc  2201 venue was determined as per 28 usc  1391 holding that venue for litigation was proper based on 28 usc  1441 regardless of whether defendant was doing business in the district within the meaning of 28 usc  1391 holding that under the fsia personal jurisdiction   depends upon the district court finding subject matter jurisdiction under 28 usc  1330a and proper service under 28 usc  1608 holding dismissal is proper for noncompliance with 28 usc sec 2675 holding sum certain requirement of 28 cfr 142a applies to 28 usc  2675