Verification of properties

Good afternoon, I have registered numerous homes of ours with booking.com and was informed that i would receive a letter for verification at every home, this will not be possible as none of the homes have mail boxes as they are all set for vacations and not to receive mail! I need to get this set up ASAP as I have had bookings already for May 2020 and i'm not able to accept credit cards for damages etc.

I look forward to your reply.