Topic summary
Landlords

Extracted from the Wikipedia article Landlord.
Security for rent and extra fees
Landlords or their agents commonly collect security deposits from tenants, and in some jurisdictions may also charge move-in or administration fees. The amount of the security deposit can significantly impact a tenant's decision to rent a property; a high deposit acts as a barrier to entry, while a lower deposit makes a property more attractive in competitive rental markets. Security deposits are rarely negotiated during pre-tenancy discussions. By law, security deposits are typically intended to cover unpaid rent, property damage, or cleaning/repair costs that result from the tenant's occupancy.