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9611 SE 36th Street
Mercer Island, WA 98040
Phone: 206.275.7783
Fax: 206.275.7787
Email: mifinance@mercergo. . .
Hours: 8:30 am - 5:00 pm (Mon - Fri)
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City of Mercer Island / Finance / Accounts Payable

Accounts Payable

The Accounts Payable function is responsible for issuing payment for all City bills.  The City of Mercer Island is committed to the timely and accurate processing of all vendor payments. 

Payment Procedures

Checks are issued on a weekly basis and are prioritized by vendor payment terms.  All invoices submitted to the City should include a valid purchase order number.  All vendor payments will be mailed to the remit to address included on the invoice.  Invoices should be submitted to the City of Mercer Island at the following address:

City of Mercer Island
Attn: Accounts Payable
9611 SE 36th Street
Mercer Island, WA  98040

To check on payment status contact Accounts payable at 206.275.7786.

Vendor Requirements

As required by the Internal Revenue Service all vendors must have a current form W-9 on file with the City.  The form must be filled out completely and mailed to the above address.  Failure to comply may result in backup withholding or payment of invoices to be delayed until the W-9 is returned.

W-9 Form 

Lost Check

In the event a City issued check is lost or destroyed, a replacement check can be issued by having an affidavit filed with the City.  Once the affidavit of lost check, including a notarized signature, is complete mail it to the above address and a replacement check will be issued.

Affidavit Form 
 



 

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