Gather the letter, envelope, and pen
Write the recipient’s name on the front center of the envelope
Write the street address below the name
Write the city, state, and ZIP code on the next line
Write the return address in the top left corner
Place the letter inside the envelope
Fold the letter if needed to fit the envelope
Insert the letter fully into the envelope
Seal the envelope flap
Add a stamp in the top right corner
Mail the envelope