A signature in addition to the
principal signature of another in order to verify the authenticity of the principal signature. 163 A. 787, 788.
The term does not have a definite legal significance as to whether the signature is one of a
principal or a
surety. 121 Cal. Rptr. 453, 455. However, an
indorsement which clearly shows that it is not in the chain of
title is
notice that it is there only as an accommodation.
U.C.C. ยง3-415(4).