Is paying a refundable security deposit for renting a house, which is a legal requirement in the country, considered unlawful (haram), and does the tenant incur sin if it is usury (riba)?

It is permissible for the property owner to stipulate that the tenant pays a security deposit or a pledge to guarantee the owner's right, such that any unpaid rent or damage caused by the tenant to the property can be deducted from it. Whatever amount remains undue from it, remains a trust with the landlord, and the landlord is not permitted to benefit from it except with the owner's permission. The tenant is only liable in cases of transgression or negligence.