Hey, I'm thinking of cosplaying as PM this summer and I'd just like to know if it's okay for me to borrow (steal) your idea of having a lot of in-character letters written up to give to people cosplaying as the addressees?

Go for it!! Hell, you can even take my letter collection:

Make sure to double check  before printing. Some of them reference the state I live in or the convention they were written for, or are out of date in general.

LETTER COLLECTION

If you need help with anything else I wrote a PM guide too.