Stories We Like: A Guide to the Comma
c.1400, "piece of writing at the end of a document," from Middle French subscription, from Latin subscriptionem (nominative subscriptio) "anything written underneath, a signature," noun of action from past participle stem of subscribere (see subscribe for etymology and sense development).
subscription sub·scrip·tion (səb-skrĭp'shən)
The part of a prescription giving the directions to the pharmacist.
The subscriptions to Paul's epistles are no part of the original. In their present form they are ascribed to Euthalius, a bishop of the fifth century. Some of them are obviously incorrect.