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.
005691
018005
021177
021636
022631
022913
056013
076080
077311
105324
110398
117097
142056
142272
142822
152668
185066
221361
223281
312504
326003
366005
370005
372274
374006
379505
380180
381529
381543
481222
481264
481366
553006
553019
604333
608032
725044
730836
731432
752076
752118
754027
853411
853902
901629
921790
927981
931775
933181
940086
941004
941516
945548
950985
951112
967069
982075
982480
997170
— Product Information Requirements, Mail Entry and Payment Technology, 2-9-23
