@Inna22 Dear Inna -- you know that some guests just don't get it. The only way that I have been able to ensure that guests have the correct door code is to send a VERY specific message AFTER sending the Welcome Package with the turn-by-turn map, door codes and contact info.
Email message subject: Door Access Code for "name of property".
Text of message: The unlock code for the front and back doors to "name of property" is XXXX.
Please acknowledge receipt of this email via return email or text message to "phone number".
That gets the job done and no phone calls in the night hours.