Roomate agreement

We strongly recommend that unmarried tenant groups enter into a separate “Roommate Agreement”.

https://bungalow.com/articles/7-essential-items-to-include-in-a-roommate-agreement-and-why-you-need-one-in
https://www.apartmentguide.com/blog/roommate-agreement-essential-topics/

Example agreements

Note – Real Estate Depot will not be a party to roommate agreements. Roommate agreements exist to resolve issues outside the lease/rental agreement.