I send out a receipt for the deposit which gives the arrival/departure dates, the balance due date and the amount of the final balance including refundable bond. I also put a remittance slip at the bottom which is returned with the final balance.
Once I receive the final balance, I send out the address of the property + phone number, contact details for my management company, driving instructions from airport to villa, map showing location of property within the community (Southern Dunes), lock box code and safe code.