When you put it through the register to print on the check, The computer is able to verify it.
Nobody can tell for sure just by looking at the check until they run it, however, there are certain requirements that have to be met before even accepting a check.
Does Walmart process checks immediately?
No, checks take a few days to get cashed and clear your account. Wal-Mart, just like everyone else, must first physically take the check to the bank before the funds are deducted. You won’t see the change in your account until after Wal-Mart makes their deposit and the bank clears the check.
How fast does Walmart process checks?
When a personal check is processed electronically, funds usually transfer within one to two business days. And, according to Walmart’s posted policy, it’s possible that the money will be deducted as quickly as the same day.
Can a check be declined at a grocery store?
If a customer is found in the database, the system tells the merchant to reject the check. If he is not found, the merchant is informed that the check can be accepted.
How do I verify if a check is good?
Any legitimate check issued by a bank has a check number. The check number appears at the top right hand corner of the check. If the check does not have a check number, the check is fake. If it does have a check number, check the number against the number in the magnetic ink character recognition (MICR) line.