A "rejected by payment gateway" notification means the transaction attempted by a customer in your e-commerce store was declined by the payment processing system. This can occur for a variety of reasons, including insufficient funds in the customer's account, incorrect card details, expired credit card, or suspected fraudulent activity. A payment gateway rejection means that the sale is not completed, and the customer's order cannot be fulfilled until a valid payment method is provided.
These rejections are typically an automated process, driven by the rules and security protocols set by banks and credit card networks. It's not a reflection of any issue within your online store itself. To mitigate customer frustration, implementing clear communication about the rejection and offering assistance or alternative payment methods can help in completing the sale. Integrating with a robust and reputable payment gateway (like MONEI) can also reduce the likelihood of erroneous rejections.