The security deposit is the landlord's insurance against damage or tenants leaving without paying their rent. The landlord may subtract the cost of any damage or cleaning incurred after you leave the apartment. However, the landlord should not charge you for normal wear and tear on the apartment or excessive cleaning charges if you have cleaned the apartment. Make sure that all agreements with your landlord are in writing. If you make any agreements with your landlord or are requesting repairs, put it in writing.
Verbal agreements are usually worth nothing.
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