Dunning The credit card of Bank of Communications entrusts a third-party dunning company, and many banks outsource dunning business to specialized companies, which leads to the entrusting party of Bank of Communications, so the entrusting party of Bank of Communications is dunning. If the credit card is overdue and the cardholder forgets to repay it, he must repay it as soon as possible, preferably in full, and call the bank credit card center.