Please do NOT send to the IRS. Fill out the W-9 form. Send to: Washington State Department of Labor and Industries Statewide Payee Registration for. L&I. Non-MIPS. Please read the following instructions before completing and mailing the statewide payee and identifying number to the department. Please do NOT send to the IRS. Please print this statewide payee and identification number out and save your copy. Please send it to the department. The Department of Labor and Industries maintains a central directory of all Statewide Payees. If you have questions about your own statewide payee, please contact the department. Substitute W-9 Request for Taxpayer Identification Number and Certification, and, Payee Identification Number and Certification Please see the following chart for the state of Washington's Substitute W-9 form requirements: SUBSTITUTE W-9 Form Instructions W-9. Request for Taxpayer Identification number and Certification. Submit form and certification to the Department in an envelope not requiring return on your receipt. Name, address, social security number, birth month and year. Date the form was completed.  Address to which the form is delivered. City and County of payment. Telephone number(s) (for verification purposes only) to which the form is delivered. Payee Identification Number, as shown on the original Federal and Federal-State Employment Tax Form(s), and as verified after the tax date by the Department. Address to which information for a tax exemption deduction claim may be delivered. Telephone number(s) (for verification purposes only) to which information for a tax exemption deduction claim may be delivered. Address to which a copy of the Federal and Federal-State Employer's Exemption Certificate for the tax year is to send. Telephone number(s) (for verification purposes only) to which a copy of the Federal and Federal-State Employer's Exemption Certificate for the tax year is to send. Taxpayer Identification Number, as shown on the original Federal and Federal-State Employment Tax Form(s), and as verified after the tax date by the Department. Street address to which the form must be returned after payment is received.