 Houston Chronicle | Bills checked after fake cash at Houston libraries KSAT San Antonio Officials say staffers are using counterfeit detector pens to ID fake bills printed on copier paper, not cotton-and-linen-fiber paper used by the government. A mark placed on the bill ... Email Alerts · RSS News Feed · Mobile · Live Streams ... Houstons public library scans for counterfeit $5 bills Houston librarians keep a wary eye for counterfeit bills Library fees paid with fake cash |