Blatantly nicked from elsewhere (cheers Marc :) )

[TLM]

Remember reading about pens with a tagged ink, a very fine particle mixsture that is unique to each pen. Other trick is to mix fluorescent or IR reflective components to the ink. No present copier has them.

 

[Nice65]

Trying to fix it but it may take some time (if at all)

No sweat, I can use a Florida VPN.