You can sue your friend in Small Claims Court for the amount you are owed ($340) plus any bank fees charged to your account for the bounced checks.  Your damages (the amount you are seeking to recover in your lawsuit) should include the above amounts plus court costs.  Court costs would include the court filing fee and process server fee.If you get a judgment against your friend, it would be advisable to request a wage garnishment from the court to insure that your friend will pay the judgment given his track record of bounced checks.