For visa cancellation process in dubai is necessary that you do not have any debts. To ensure it you will have to terminate your bank account, loans & credits cards.
Some employers would ask you to produce "No Liability Certificate" , which shows that you have no pending loans or credit card bills to be cleared, to make the final payments. These bank accounts or credit cards have been opened under the sponsorship of your employer. Hence they will require you to close it before your visa cancellation formalities. Follow the link to read more about visa cancellation process in uae