Does the Spanish language have a word for postscript?

"Posdata"

This word is a direct translation of the English "postscript" and is used in the same way. It is often abbreviated as "P.D." or "P.S."

For example:

"Atentamente,

[Your name]

P.D. Te llamo mañana."

(Sincerely,

[Your name]

P.S. I will call you tomorrow.)