Yeah. I always have a padded envelope with stamps in and addresses to myself, just in case.

How to Send a Letter or Postcard

Three Envelope Art Mini-Tutorials – The Postman's Knock

How to Mail a Bubble Mailer – BoxGenie

Adult Swim - We'll SMAIL you a SURPRISE if you SMAIL us first. Send a self-addressed stamped envelope to the following address, get something for free, and sleep tight knowing you've supported

How Big Of A Package Can You Send Using Stamps? –

How to Write a Mailing Label for an Envelope

How to Send a Letter or Postcard

How Many Stamps Do I Need? and Where You Can Buy? - PostGrid

How to send a Self-Addressed Stamped Envelope - Meagan Spooner

How to Send a Letter or Postcard

I don't have access to a printer, so would it be ok to just write the address on this piece of paper and tape it on the envelope? : r/USPS

When mailing a letter in the U.S., are you allowed to write or affix anything on an envelope other than a stamp, an address, and the return address? - Quora

Stamp Price Guide for 2023