If you’re a new Costco.com member, select Create Account, then enter your email address and your choice of password. If you’re a member, enter the membership number found on your …

Download the SDS sheet for the Kirkland Signature Heavy Duty Laundry Detergent - #119903 SDS Sheet (PDF) Back to Top

Whenever you successfully complete an online order, you’ll be taken to a screen with your Order Confirmation number. You’ll also be sent an email with the same details. If you don’t see your …

Welcome to the Costco Customer Service page. Explore our many helpful self-service options and learn more about popular topics.

Welcome to the Costco Customer Service page. Explore our many helpful self-service options and learn more about popular topics.

Welcome to the Costco Customer Service page. Explore our many helpful self-service options and learn more about popular topics.

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 …

Retrieving your order history is simple! Just head over to Costco.com and select Orders & Returns near the top of the page. Log in using your email address and password. Once in Orders & …

Select the reason for the cancellation and click Cancel Order. When an order is cancelled, the pre-authorization is immediately released by Costco.com and removed from your financial …