As the Super Bowl approaches, Airbnb rival Vrbo announced its use of “unauthorized event prevention technology,” algorithms that try to avoid house parties at rental properties. Similar to a credit system, the tech generates a risk score for each booking, giving hosts a chance to call it off.

The Expedia-owned company will score renters based on their length of stay, lead time, number of guests and other factors. Vrbo is careful to add that it doesn’t use demographical information (race, sex, gender, age and so on) to evaluate risk. If a renter triggers a warning, Vrbo sends the host an email alert, giving them the option to cancel without a penalty; guests also receive a message reminding them of the policy.