While a lonely tenant may not have the power to chase away a bad roommate, the landlord might have the power, especially if that roommate isn`t in the lease. Even if formal authority is lacking, building owners often have the intimidating factor to dislodge inflamed tenants. A good practice is to share the roommate agreement with the landlord at the beginning to make sure everyone is on the same side. 4. Surety. The roommate pays the principal tenant a deposit of $[SURETY] as security for the payment of a delay in this roommate`s lease or damage caused by the roommate at the residence, other than the usual wear and tear. This deposit cannot be treated as the last month of rental under this agreement….