In the practice of bankers. This is a depositor’s check recognized and accepted by the proper officer of the bank as a valid appropriation of the amount specified to the payee named, and as drawn against funds of such depositor held by the bank. The usual method of certification is for the cashier or teller to write across the face of the check, over his signature, a statement that it is “good when properly indorsed” for the amount of money written in the body of the check.