In the case of checks, stamps, and checks payable in exchange at current rates are held not to be negotiable. The order barring them from the local Federal Reserve Bank will apply to any question or restriction in the terms of the check, which will impair or destroy its negotiability, and attention is directed by Governor Seay to the danger both to banks and the public in giving credit on such instruments. On the question of the validity of the instruments in question, the Federal Reserve Board has instructed the local bank as follows: "Our counsel holds that checks so payable are not valid negotiable instruments, inasmuch as they are not made payable in a sum certain in money, as required by law, but are made payable in domestic exchange. He is, therefore, of the opinion that Federal reserve banks have no authority, under the law, to charge such checks to the accounts of member banks, but must accept payment in exchange according to the terms of the check. The common law definition of a check is a written order for money drawn on a bank or banker, and of a draft, a written order drawn by one person upon another, directing the payment of money on account of the drawer. "Section 1 of the Federal Reserve Act provides that 'Every Federal Reserve Bank shall receive on deposit at par from member banks, checks, and drafts."  This does not authorize Federal reserve banks to receive for credit or for collection, orders for exchange or other non-negotiable instruments. 