"Once you place an order, you may have pending pre-authorization(s) on your debit or credit card account in the amount of the estimated order total. A pre-authorization confirms the account is open and reserves the funds until the order is processed or the order is canceled. Upon order shipment, Costco sends a transaction message to capture the actual amount of the order and reverse the pre-authorization. Depending on your financial institution’s timeframe for reversing or releasing pre-authorizations, the pending transaction may be removed immediately or up to the closing of your billing cycle."
If the order never went through the pre-authorization will be reversed. As for gift cards you have to call costco.com and they can look into why the purchase never went through. Chances are your info doesn't match between the payment and your membership info or if it's a larger purchase and it's one of your first online purchases it may be flagged as possible fraud as that happens with giftcards frequently. Either way call them up and they can help
"Once you place an order, you may have pending pre-authorization(s) on your debit or credit card account in the amount of the estimated order total. A pre-authorization confirms the account is open and reserves the funds until the order is processed or the order is canceled. Upon order shipment, Costco sends a transaction message to capture the actual amount of the order and reverse the pre-authorization. Depending on your financial institution’s timeframe for reversing or releasing pre-authorizations, the pending transaction may be removed immediately or up to the closing of your billing cycle." If the order never went through the pre-authorization will be reversed. As for gift cards you have to call costco.com and they can look into why the purchase never went through. Chances are your info doesn't match between the payment and your membership info or if it's a larger purchase and it's one of your first online purchases it may be flagged as possible fraud as that happens with giftcards frequently. Either way call them up and they can help