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.
009909
018008
018544
019667
027122
029101
029479
029643
031070
041008
044009
056022
060406
066110
071065
077014
080117
093458
098680
103281
105412
107195
108789
112070
117604
119177
152048
152918
153034
174072
185061
257111
282963
305003
330718
330825
331683
372215
402274
441425
452221
452387
483990
490713
490714
491114
492125
531358
531525
531613
532467
551008
551100
553933
554074
570109
571018
600114
605640
662587
672409
701069
730128
731379
731410
731462
731574
738004
740497
741387
741576
741623
741737
744092
747016
770108
782161
904110
914115
915001
917623
920001
921711
924276
927890
932009
940191
941813
980666
981985
982297
995342
997115
998012
— Product Information Requirements, Mail Entry and Payment Technology, 3-24-22
