shredded money in the mail?

Last week a piece of mail was received at this address that contained a small plastic ziploc baggie filled with what seemed to be shredded paper money, together with a letter describing the services of a local insurance agency here in Bradford PA, hand-addressed using blue ink ("idle hands do the devil's work"?).  The agency name was not fully spelled-out on the envelope, using only the initials 'W. A.'.  The entire mailing is a fiction-grade idea possibly implemented to provide pocket money for teenagers or other workers, and included other handwriting applied throughout the letter.