Hello, @Tiffany944 , according Airbnb rules the host and guest receive each other's contact information after a booking is confirmed. Providing contact information before then is a violation of Airbnb's terms.
Hosts aren’t allowed to charge guests a security deposit through Airbnb Resolution Centre or outside the Airbnb platform. Instead, Airbnb informs guests at the time of booking that their payment method may be charged if they cause damage during a stay.
Here you can see more information:
https://www.airbnb.co.uk/help/article/140
Kind regards.
Elena.