Hi Mark, At the moment Tokeet has a few options. One of which won't work for what you are describing. I'll cover this one first. Data dictionary token that creates a random 4 digit code. An email template will send out to the user giving them a unique 4 digit code. However, a human would have to take this information and update the door code using an online remote lock provider. Using an automated payload in automata, you can send the guest phone number. Since you only need just the last 4 digits of the string the function should be pretty simple. Programming that data to flow to your remote lock would be possible if they provide this option to you. Please let us know how you manage with this. We're looking at some direct integrations for the future but it would be great to see this type of workaround in the meantime. Thanks, Christian