Answer:
This problem seems to pop up all over the place. The IRS takes the stance that the only good reason to cash a check payable to a corporation is to evade taxes. You should not aid and abet that particular crime! Whether you know your customer real well or not, a check payable to a corporation MUST be deposited into the corporate account in full. After it is deposited, if you wish to credit the account as a cash deposit, do so, and then let your customer write a check on the account. That way you're both safe.
First published on BankersOnline.com 12/3/01