How can I contact the Costco Corporate Offices? We are happy to call Washington state our home. Visit our corporate offices at: 999 Lake Drive Issaquah, WA 98027 Or, write us at our mailing address: Costco Wholesale P.O. Box 34331 Seattle, WA 98124 Finally, feel free to call us at 425-313-8100. We’re available Monday–Friday, 8 a.m.–5 p.m. PT. The best place to learn more about Costco hearing aids is to head on over to the Costco Hearing Aid Center website. You’ll find that it’s packed with helpful information about our staff and the latest product offerings, including premium hearing aid technology and open-fit design. Welcome to the Costco Customer Service page. Explore our many helpful self-service options and learn more about popular topics. Business Memberships allow you to purchase products for business, personal, and resale use at any Costco Wholesale location worldwide and online at Costco.com. One additional card is also provided for a member of your household at no additional charge. Like all Costco memberships, it’s valid for one year and must be renewed annually. The Costco Tire Center offers several installation and maintenance services to get our members on the road, including rotation, balance, nitrogen inflation, nitrogen conversion, and flat repair. Costco Business Center Orders 1-800-788-9968 Phone Hours: Mon - Fri: 6am - 5pm PT Chat Hours: Mon - Fri: 8am - 5pm PT For resale, Costco.com requires the appropriate resale certificate from the state where the shipment was delivered. For exempt organizations, such as schools and nonprofit organizations, most states require that purchases be made with a credit card in that name of the tax-exempt business or agency. The Costco Savings Booklet is sent to the Primary Member of Executive, Business and Gold Star Memberships of active shoppers. Each Affiliate Cardholder on a Business Membership also will receive the booklet if we have their personal address. If you have one of the above memberships, but still haven’t received your savings booklet, some of the following may have happened: You may have. Welcome to the Costco Customer Service page. Explore our many helpful self-service options and learn more about popular topics. Costco Business Members may be exempt from tax on warehouse purchases based upon their resale licenses or tax exempt status. However, qualifications may vary, depending upon your state. So, we recommend that you either visit or call your local Costco warehouse for more information.