Voiding a check is a simple process that's necessary more often than you might realize. Many employers require a voided check for direct deposit. Some agencies require it to verify your identity. Other places use it to automatically debit your account for monthly services, making payment convenient. And, of course, there are times when you make an error that requires you to discard a check and render it useless.
Grab a blank check from your checkbook. Use the check that's next in numerical order, and from the account that's relevant to your purpose.
Write "VOID" in large, bold letters across the entire face of the check. Use a pen or permanent marker--something that cannot be erased or changed easily.
Also write "void" on the signature line and in the amount box. The bank examines these two areas when someone cashes a check. The bank attendant should notice a "void" or something unusual about one of these spots if a forgery takes place.
Record the voided check in your check register, noting the check number. This will be helpful if money goes missing from your account, or if you need to account for a certain check.