Not sure the best place to ask my question but here it goes.
We are inviting guests to the wedding that are overseas and will need a letter of invitation along with a copy of our US passport in order to gain a visa. My question is, I don't know these guests very well (friends of FI parents, and they don't have a US Passport). Is there any concerns I should have if I send my information to the embassy and they come to the states and don't return?
Am I held responsible if they do anything wrong?
Wedding date July 7, 2012