'Handwriting' in the Bible

having canceled out the certificate of debt consisting of legal demands [which were in force] against us and which were hostile to us. And this certificate He has set aside and completely removed by nailing it to the cross.

I, Paul, write you this final greeting with my own hand. This is the distinguishing mark in every letter [of mine, that shows it is genuine]. It is the way I write [my handwriting and signature].