How can I ask surfers that I host from Couch surfing for passport photocopy without making them uncomfortable?

I'm hosting people from couch surfing in house that I live with my parents to make my parents comfortable for the surfers. I'm asking for passport photocopy? What is the best explanation and best words without making my surfers uncomfortable?

Most Helpful Girl

  • Don't they already have multiple 'checks and balances' through the program, to ensure that everyone is safe? I don't think it's necessary to ask for anything extra and a photocopy of a personal ID document, is asking a lot.