Address
MAILING ADDRESS
PO Box 34108
Seattle WA 98124-1108

SHIPPING AND PHYSICAL ADDRESS
151 South Lander St.
Suite C
Seattle WA 98134-1889

Contacts

Phone: (206) 254-0975
FAX: (206) 254-0968
Phone Pay/Inquiry: (206) 254-9955

Toll Free:
Phone: (800) 275-2033
FAX: (888) 313-0021
Phone Pay/Inquiry: (877) 651-3864

Additional Resources

Business Client Gateway

Secure File Upload

AFTCHEX Login
Postal Resources
Privacy & Security Policies
PCI Compliance Certificate
Employment Opportunities

CASS "Error Codes" Listing