The agreement must comply with all applicable state laws and, if the residential structure was built before 1978, it must be submitted at the same time as the lead-based painting form. You can also set the point where a guest spends the night of their welcome. Most owners allow guests to stay no more than 10-14 days for a period of six months. From there, you can decide if a client who stays 15 days or more gives you reasons to distribute tenants due to the breach of the lease, or if you want to change your lease and if it increases the rent. The only time a lease is not appropriate is if you are renting to someone with the intention that they will live there for the long term. In this case, you want a formal lease. The gray area is the home of long-term guests who have moved into your rental without your permission….