I think the postcard makes sense to check identities because in Japan each family has a seal (Not trivial to replicate) and they 'sign' correspondence that way.
Never been to Japan, I must have read it somewhere, so reader beware.
The postcard, like using a .edu email, is just a barrier to entry. The seal functions as a signature, and asking for it in a postcard would be very suspect.
Comments
I think the postcard makes sense to check identities because in Japan each family has a seal (Not trivial to replicate) and they 'sign' correspondence that way.
Never been to Japan, I must have read it somewhere, so reader beware.
The postcard, like using a .edu email, is just a barrier to entry. The seal functions as a signature, and asking for it in a postcard would be very suspect.