To endorse a check for deposit only, write "For Deposit Only" followed by your signature. This restricts the check to being deposited into your account and prevents anyone else from cashing it. Ensure your signature matches the one on the front of the check. Write clearly and legibly to avoid any issues with processing. Do not write anything else on the endorsement line unless specifically required by your bank or the check's recipient. For example, you might need to add your account number in some cases. Always keep a record of the check number and amount for your own accounting purposes.

If you need to endorse a check to someone else, write "Pay to the order of [Recipient's Name]" followed by your signature. This transfers ownership of the check to the named recipient. Again, ensure your signature matches the one on the front of the check and write clearly. This method is less secure than "For Deposit Only" as the recipient can then endorse it further or cash it.

Never sign a check on the back until you are ready to deposit or transfer it. An unsigned check on the back is vulnerable to theft or misuse. If you make a mistake, do not try to erase or cross out the error. Instead, write "VOID" across the check and contact your bank for assistance. If the check is damaged or illegible, contact your bank immediately. They can guide you on the proper procedure for handling such situations. Always be cautious and aware of potential fraud when handling checks.