You can replace a lost Costco Rewards check by contacting Costco member services with your membership number and the approximate amount

A lost Costco Rewards check is not permanent. Costco will reissue it if you report the loss before someone else cashes it. You will need your membership number, the quarter or year the check was issued, and ideally the amount. Costco can stop payment on the original check and mail you a replacement, though the process takes a few weeks.

The sooner you report it, the better. If the check has already been cashed by someone else, Costco's fraud department can investigate, but recovery becomes much harder. Acting within days of discovering the loss gives you the strongest position.

Key Takeaways

  • Call Costco member services with your membership number and report the lost check before attempting to cash a replacement.
  • Have the check amount and the month or quarter it was issued ready when you call, as this speeds up the search in their system.
  • Costco will place a stop payment on the original check and mail a replacement to your membership address, which typically arrives within two to three weeks.
  • If the check was already cashed by someone else, report it when ready to Costco's fraud team and consider filing a police report for documentation.
  • Costco Rewards checks cannot be replaced by visiting a warehouse location — the process must go through member services by phone or online account.

How to report a lost Costco Rewards check

Contact Costco member services by phone at 1-800-955-2292. Have your membership card or membership number ready. Tell them you lost your Rewards check and provide the approximate amount and the time period it was issued (for example, "the Q3 2024 check" or "the check I should have received in September").

If you have the original envelope the check came in, that information helps. Costco will look up the check in their system, confirm the amount, and place a stop payment order on it. They will then arrange to mail a replacement check to the address on file with your membership.

You can also report a lost check through your Costco online account if you have one set up. Log in, go to your membership details, and look for a "Contact Us" or "Member Services" option. Some members find the phone route faster because a representative can confirm the stop payment is in place when ready.

What happens if someone else cashes your lost check

If you discover the check was already cashed by someone else, call Costco member services when ready and explain the situation. Costco's fraud department will investigate the check and may be able to recover funds, though this depends on when the check was cashed and how the bank processed it.

You should also file a police report, even if you do not know who cashed the check. A police report number gives you documentation if Costco's investigation takes time or if you need to dispute the transaction with your bank. Keep a copy of the report for your records.

Costco will not automatically refund you if someone else cashes your check, but their fraud team will work with the bank to trace the transaction. The process can take several weeks. In the meantime, Costco will typically issue you a replacement check for the original amount while the investigation is underway.

How long replacement checks take to arrive

A replacement Costco Rewards check usually arrives within two to three weeks of when you report the loss. Costco mails it to the address on file with your membership. If you have moved recently and your membership address is outdated, update it before calling member services so the replacement goes to the correct location.

During this waiting period, the original check is flagged in the system. If someone tries to cash it after you have reported it lost, the bank will reject it because of the stop payment order. This is why reporting quickly matters — the longer you wait, the greater the window for someone to cash it before the stop is in place.

If you do not receive the replacement within three weeks, call member services again with your case reference number. They can check the mailing status or reissue it if there was a delivery problem.

Why Costco Rewards checks are mailed instead of deposited

Costco sends Rewards checks by mail rather than depositing them directly to a bank account. This is how Costco has always structured the program — the check arrives at your membership address once or twice a year depending on your membership tier and spending.

Because checks are physical items in the mail, loss does happen. Mail can be delayed, misdelivered, or stolen from mailboxes. If you know a Rewards check should have arrived but did not, check with neighbors or your mail carrier before assuming it is lost. Sometimes checks are delivered to the wrong address on the same street.

If you want to reduce the risk of losing future checks, consider having mail held at your local post office when you travel, or ask a trusted neighbor to collect mail while you are away.

Preventing future lost Costco Rewards checks

Once you receive your replacement check, consider cashing it or depositing it promptly rather than leaving it sitting at home. Rewards checks do not expire, but the longer they sit, the higher the risk of loss or damage.

You can deposit a Costco Rewards check at any bank or credit union, just like any other check. Most banks allow mobile deposit through their app, which means you do not have to visit a branch. This is often the fastest and safest way to access the money.

If you travel frequently or have an unstable mail situation, you can also ask Costco member services whether they offer any alternative delivery methods. While most Rewards checks are mailed, it is worth asking if your specific membership has other options.

What if you never received the check in the first place

If you believe you should have received a Costco Rewards check but never got one, the process is similar. Call member services and provide your membership number. They can confirm whether a check was issued to you and, if so, whether it was mailed. If it was mailed but you never received it, Costco will investigate the delivery and reissue the check.

This sometimes happens when mail is lost in transit or when a membership address was incorrect at the time the check was mailed. Costco can see the mailing date in their system, so they can tell you whether the check should have arrived weeks ago or if there was a recent address change that caused a delay.

Frequently Asked Questions

Can I get a replacement check if I already cashed the original?

No. Once a check is cashed, Costco considers it processed. If you cashed the original and then lost the money, that is a separate financial matter outside Costco's scope. Only report a check as lost if you genuinely did not receive it or cannot locate it before cashing.

Does Costco charge a fee to replace a lost check?

Costco does not charge a fee to reissue a lost Rewards check. The replacement is issued at no cost to you as part of their member services.

What if I moved and the check went to my old address?

Contact Costco member services and update your membership address. If the check was mailed to your old address, Costco can issue a replacement to your new address. The post office may also forward mail if you filed a change of address, but it is faster to have Costco reissue it directly.

Can I pick up a replacement check at a Costco warehouse?

No. Replacement checks are mailed only. You cannot pick one up in person at a warehouse or have it held for pickup. The process goes through member services by phone or online account.

How do I know if my Rewards check was actually issued?

Call Costco member services with your membership number, and they can confirm the dates and amounts of all Rewards checks issued to your membership. This tells you whether a check should have arrived and when it was mailed.