[dmurray]

An agreement in writing is usually a verbal agreement, so it's not even wrong. Perhaps someone meant to contrast an oral agreement with a written one.

[tomnipotent]

> An agreement in writing is usually a verbal agreement

A verbal agreement inherently means there's no written agreement. Also, oral = verbal.

[manigandham]

That's incorrect. Legally, verbal primarily means using words. The technical difference is whether an agreement is written or spoken/oral.