For example: in the UK when you sign someone else's passport application (and the back of their photo) you must supply your own passport number.
In other words, they're creating a web of trust (about 20 years late).
We're on the cutting edge with Bitcoins; why are we doing things the old fashioned way? And why trust notary signatures from some random lawyer you don't know half way around the world?
Here's a suggestion:
- Supply a field in each Mt.Gox account for a PGP public key
- Verify an account with a public key with whatever meat-space mechanism you like
- Supply a field to allow upload of a photo of a signature
- Verified user-A signs (physically) the notary document for unverified user B; takes a photo and signs that photo with their PGP key. User-B can upload this photo + digital signature at their leisure.
- Mt.Gox can now compare the digitally-signed photo of User-A's pen-signature against the digitally-signed photo of the signature on User-B's proof-of-identity.
- User-B uploads their public key, which user-A will have signed as well.
Bitcoin users usually know each other (it's a word-of-mouth technology); so there is huge scope for this sort of thing.
When the feds come knocking, you have a chain of signatures, both digital and real, that can lead you back to someone who was verified by sight of a passport, or whatever AML documents you want.
That is an excellent idea