A written or printed message addressed to a person or organization and usually put in an envelope and send by post.
In this video, the five-year-old ASL speaker uses a different handshape in her passive hand. She has been signing this way always. At the time of recording this video, I offered a correction. She signed again without a change. I left it as it is for the purpose of case study on this phonological acquisition. I'll follow up later.
A drawing of the letter at age 4.