what envelope for a cryptogram note?, An envelope for a cryptogram note is often referred to by the word “envelope”. An envelope is a paper sleeve or pouch in which a letter or other document can be inserted to protect it and send it by post or courier. It is a tool widely used to guarantee the confidentiality of the content and ensure that the message arrives safely at its destination. Envelopes usually have an adhesive strip or tape that seals them after the note or message has been inserted.
Cryptograms are riddles or puzzles in which the letters of a word or phrase are encoded in a certain way, usually by replacing or moving the letters. The term “cryptogram note cover” does not appear to be a commonly used term or concept in this context. It is possible that it specifically refers to a certain type of cipher puzzle or a certain technique for hiding the solution. If so, more context is needed to answer specifically.