Costco

Get help with (5)

• Refund requestCostco refunds most products under its satisfaction guarantee; electronics and major appliances have 90 days.
• Item arrived damaged or defectiveRefuse a damaged delivery, or return or replace the item through Orders & Returns.
• Lost packageReport a lost Costco.com shipment for a return or replacement; missing items are replaced, not refunded.
• Cancellation problemCancel the membership and ask for a fee refund; stop auto-renewal at least 72 hours before the renewal month.
• Warranty claimUse Costco Technical & Warranty Services for covered electronics and appliances.

Contacts (7)

Escalation path

Go up one step at a time. Keep the reference numbers and dates from each contact.

1. Customer service

   ChatCostco Customer Service contact page (phone and chat by topic)

2. Supervisor

   PhoneMembership and warehouse (Member Service Center) +1-800-774-2678

3. Written complaint

   FormCostco feedback form

4. Card or bank dispute

   Fair Credit Billing Act billing-error and purchase-dispute rights (Regulation Z)

   Electronic Fund Transfer Act error resolution and unauthorized-transfer liability (Regulation E)

5. State agency

   Your state’s attorney general. Find it in the list of state agencies (also as JSON: states/<code>.json, for example states/ny.json).

6. Public complaint

   RegulatorBetter Business Bureau

Known blockers

Scam warnings

Verification notes

Costco is a paid-membership warehouse club. Its terms of use send legal actions to the state or federal courts in Seattle, Washington; no arbitration clause was found in the terms (last updated October 7, 2026).