Payments can be declined by the banking institution that issued your payment method due to several factors. One common reason for a declined credit card transaction is reaching the card’s credit limit. When the available credit on your card is fully utilized, any further transactions will be declined. Additionally, transactions may be declined if the card's fraud protection measures are triggered. This can occur if the bank detects unusual or suspicious activity on the card, leading to a temporary hold or decline on transactions until the situation is resolved. Another possible cause for payment rejection is entering incorrect payment information, such as an inaccurate card number, expiration date, or security code. It is advisable to contact your bank directly to obtain specific details regarding the declined payment and to seek assistance in resolving the issue.