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[[13137]] Any writing to be a negotiable instrument within this division must:be signed by the maker or drawer; contain an unconditional promise or order to pay a sum certain in money and no other promise, order, obligation or power given by the maker or drawer except as authorized by this division; be payable on demand or at a definite time; and be payable to order or to bearer 13 Pa.C.S. § 3104(a).

The first requisite of negotiability, a signature by the drawer or maker, 'includes any symbol executed or adopted by a party with present intention to authenticate a writing.' 13 ...