Read the document to make sure it meets your needs and that everyone involved agrees with the letter of intent. Remember that if you have any questions you can easily Ask a Lawyer.
Print out two copies of the letter of intent (one for each party).
The party sending the letter should sign both copies and send them to the party receiving the letter.
The party receiving the letter should:
sign both copies under the acknowledgment statement
print their name
date the copies, and
send one copy back to the sender
Each party should keep their own original signed letter of intent.