Well, it works over there, where the address of a N American N-reg taken from the database will most likely be the owner himself.
Same in the UK, where G-INFO will usually yield the address of the owner - or perhaps his accountant if he was smart enough to give his ltd co. registered office
That is the address to which all the junk mail (GASIL, GASCO etc) and some relevant stuff like ADs, get mailed to.
What puzzles me is how route charges work in foreign lands e.g. an N-reg flying in Europe.
The obvious answer is that Eurocontrol send the bill to the address in the FAA database, which ends up with the trust company, which (for a fee of say £30) forwards the bill to the beneficial owner, who then a) pays it and b) tells Eurocontrol his real home address for future billing.
Anyway, I was curious why the CAA is selling this particular database. The only other apparently reasonable user is Eurocontrol and they must already have one.