Zakaat - Rules and modern issues

Zakaat on security amount

When taking houses, shops, complexes, etc. on rent, the landlord takes a hefty amount from the tenant.  This amount is variously termed as guarantee, deposit, Pagdi, surety, etc.  Is the Zakaat of this amount Compulsory on the landlord or on the tenant?

As the amount of security is in the possession of the landlord, the landlord has to give the Zakaat of that amount.