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
009555
012400
021909
039005
044002
067197
091934
097527
100226
100863
105209
108956
124078
127102
152089
208428
208562
208623
208679
210272
210430
210490
240050
274160
301418
303101
305003
314281
372505
445158
460161
470016
480082
486328
503007
537199
551250
600177
601101
740441
743090
755007
928260
932533
933001
941444
941756
950700
958113
958952
971072
980259
980381
995374
— Product Information Requirements, Mail Entry and Payment Technology, 12-16-21