Past Due Invoices
We can help!
Submit invoices to
King County Accounts Payable401 Fifth Ave, Ste 323
Seattle, WA 98104-1818
Please allow 10 business days for processing.
We'll need your...
1. PO number (7 digits)
2. Copy of the invoice
1. PO number (7 digits)
2. Copy of the invoice
(206) 263-9276
invoices.ap@kingcounty.gov
invoices.ap@kingcounty.gov
Contact Us
Phone: (206) 263-9400
TTY Relay: 711
Fax: (206) 296-7676