The other method is to require players to convert their funds when depositing them. However, some sites that use this policy do accept payments in a variety of currencies and convert funds at a lower premium compared to what banks and credit card companies would charge. Others only accept payment in U.S. dollars. One benefit of this method is that a player who constantly "tops up" his chip stack to a constant level (some poker rooms have an optional feature that can perform this function automatically) does not have to worry about rounding issues when topping up with a nominal sum – these could add up over time.