embellish both sides

Take a notecard or greetingcard, and cut off the front. Don't just tear it, but use scissors or hobbyknife to make a straight side. Use this front as a postcard. The card is senders choice.

Embellish the frontside AND the backside, using stickers, decotape, a drawing or doodle, stamping, or (magazine) clippings, whatever you like. When a card has a celebration text, you can put an embellishment over it.

Write the address on the card. Don't forget your Swap-Bot name, and the name of the swap. Send it without an envelope.

Not required but allowed: write a little message to your partner.