Had a similar issue recently and QR advised the following-

With regards to your query, in order for us to override or authorized the credit card verification, we would request you ask the credit card holder to submit and complete the credit card verification form at https://www.qatarairways.com/global/...ification.page. Once the submitted form is verified and accepted by the concern department, an email confirmation will be sent to the cardholder.

Once the above procedure is done you no longer have to present your credit card at the time of check in.