Re: "Old' and "solicitor" doesn't narrow things down...
I had this exact thing happen to me .... with prisoner transfer documents faced me from various courts and intended for a local cage-on-wheels company. It transpired a '8' had turned into a '3' on a multiple-times-photocopied fax list of contractors that had been making it's way around the country... In the end, it was only because they were switching over to a "more secure communications medium" (probably email!) that they stopped...
Shame, reading about the low-lifes was occasionally entertaining, and gave me a reason to keep hold of the old fax machine that's now buried in a cupboard somwhere..