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.

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 …

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 …

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

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

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 …

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.