Hi Valerie!
You'll want to make sure you have added the expectation of signing a Renter Agreement and the security deposit (hold or refundable) in your House Rules in the Airbnb API. This is how your guests will be made aware of the expectation. If you have these in your House Rules section, Airbnb will also be able to back you up on these expectations.
Because Airbnb stopped sending guest email addresses as of September 1, you'll need to make sure you have a channel template and associated trigger to send to the guest through the Airbnb messaging system. This is how you will collect their contact information, credit card information, and signature for the Renter Agreement. We have a great support article that outlines the steps to create this channel template and trigger if you don't already have one.
