It's very easy to knock up a genuine looking h'cap certificate - just scan an original, edit it via readily available (and free) graphics software, and print via a bog standard home office printer.
I know somebody who did this for a golf trip to Portugal, although in fairness he would be a 14 h'capper if he was a club member, so he wasn't getting on a top course under false pretences.
Cannot understand why a standardised system hasn't been made compulsory for all clubs. The technology is there and it would be accessible to all - no need to carry a h'cap piece of paper, just tell the club visited your membership No. and up would come your details - complete with piccy.