What happens next?

How to keep your bank account information secure
Avoid writing checks if your account has them.
While once the most common method of paying people or merchants for purchases, every check that is written contains everything needed for a fraudster to compromise your account, including your name, account number, and bank routing number.
Use a p2p (person to person) payment service to pay other people when you owe them money.
Many banks offer this service at no cost for their customers. Use debit or credit cards to pay merchants rather than writing checks.