The traditional view that one is bound by his signature may be in jeopardy in Pennsylvania.
Herman v. Stern, 419 Pa. 272, 213 A.2d 594 (1965).
Ronald H. Heck & Kenneth S. Robb,
Contracts - Signature on Instrument,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol4/iss3/10