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.
005846
008028
008590
009413
009909
016846
018544
021909
022906
034640
038609
044002
067197
070043
076325
091934
097527
100226
100481
100863
103281
105209
108956
112148
124078
127102
208428
208562
208623
208679
210272
210430
272354
274160
301418
303101
305003
314281
338017
372505
445158
470016
480049
480082
486328
503007
531317
537199
551008
551250
554236
641814
740441
743090
755007
801401
871028
895130
917623
924478
928260
941444
950700
958113
958402
958952
970233
971072
980381
980742
995126
995374
— Product Information Requirements, Mail Entry and Payment Technology, 1-13-22