There are two ways to add the last 4 digits of the guest's phone number as their door code.
First, you can always create a Custom Field Definition and include it as a question on the Point of Contact Form (sent at the time the guest is asked to sign the Renter Agreement). You would ask the guest to enter the last 4 digits of their number in the field. Once they do that, the info will be stored in their individual booking under the "Custom Fields" page. You could then insert the field code name you created into any messages you send.
The other way is to use our Manual Door Locks option on the Settings > Door Locks page:
https://secure.ownerrez.com/settings/locks/add
If you use the Manual Door Lock option, you can choose to set the code to the last 4 digits of whatever number is listed as primary in their booking. Doing this will make the last 4 digits show up on their individual booking on the left side of the Overview page. If you decide to use this option, you would insert the standard Field Code of {BDOORCODE} in your email template/messages.
