 Houston Chronicle | Houstons public library scans for counterfeit $5 bills Albany Times Union (blog) Widely available at office supply stores, the pen contains a solution that detects bills printed on common copier paper rather than the cotton-and-linen-fiber paper the U.S. government uses. When a librarian marks a bill ... RSS feed for comments on ... Bills checked after fake cash at Houston libraries Houston librarians keep a wary eye for counterfeit bills Library fees paid with fake cash |