Amazon will attempt to charge your credit card for the amount you owe if your seller account has a negative balance at the end of a settlement period. However, the amount charged may be less than the total amount you owe if a credit limit imposed by your bank. Amazon will continue to charge your credit card as often as every 24 hours until the remaining balance in your seller account is paid in full.
You can also use the Make a Payment feature to repay the balance you owe. For details, see Making a Payment.