Proper use of P.S. in a letter?

Question

Specifically, if I have a P.S. statement, and then wish to add another, do I write P.S.S. or P.P.S.?

Answer 1

as you say post script and then it is post. post script  so it would be

ps. pps ppps but once you get to ppps a re write is needed  but still correct

Answer 2

yep, as above... then P.P.P.S. and so on and so on...

Answer 3

P.P.S.

P.S. stands for "post-script" so P.P.S. is "post-post-script"

Answer 4

lol!!

I usually say P.S.S

P.S.

I'm not sure how it works but good one.

P.S.S

uhmm nevermind

P.S.S.S

I'll star the darn question =p