Provide this listing to Contract Postal Units and acceptance clerks in non-POS locations without intranet access to validate a USPS Corporate Account (USPSCA) number online. For all other locations, online USPSCA validation is preferred. This list supersedes all previous notices, which you must recycle.
Acceptance clerks must not accept Priority Mail Express® shipments bearing an invalid USPSCA number in the “Payment by Account” or “Agreement Number” section of the label or form.
Note: The first 6 digits of a 9-digit Custom Designed Service and Next Day Pickup Agreement make up the Corporate Account Number.
018008
019667
027122
029101
029643
031070
038477
041008
044009
056022
060406
066110
071065
077014
078203
080117
093458
098680
105412
107195
108789
115846
148371
152048
152918
153034
174072
185061
212410
257111
295198
305003
306424
329001
330718
330825
331683
333831
337154
372215
381555
402274
402472
441425
443068
452221
452387
480019
483990
489434
490713
490714
491114
492125
531358
531525
531613
532467
551100
553056
553634
553933
554074
570109
571018
600114
605640
662587
666370
672409
681002
701069
730128
731379
731410
731462
731574
738004
740497
741387
741576
741623
741737
744092
747016
770108
782161
840623
847067
900544
914017
915001
915603
920001
921465
921711
924276
926488
927890
931682
932009
940191
941813
968541
980666
981985
982297
982515
995342
997115
998012
— Product Information Requirements, Mail Entry and Payment Technology, 4-7-22