Muppet autographs and signatures.

Signed photographs

Costumed performers

Since at least the mid-2010s, people portraying the Sesame Street Muppets at live appearances aren't allowed to sign autographs. As of 1990, at least one Sesame Street Live performer signed full messages to children.[1]

Sources

  1. Jill Popish Keech, "Silly dancing", Daily News (Newport VA), December 13, 1990, page 41.