兩個房客不用分開存，他們的錢可以放一個帳戶，只要和你的錢分開

具體帳戶什麼名義，請去本地銀行討論他們的服務，一般叫escrow account。

http://www.avvo.com/legal-guides/ugc/how-chicago-residential-landlords-should-handle-security-deposits

http://www.cityofchicago.org/city/en/depts/dcd/supp_info/security_depositinterestrates.html

http://www.illinois-attorney.com/law/city-of-chicago-residential-landlord-and-tenant-ordinance/5-12-080-security-deposits-chicago-residential-landlord-tenant-ordinance/

security deposit "shall not be commingled with the assets of the landlord, and shall not be subject to the claims of any creditor of the landlord or of the landlord’s successors in interest, including a foreclosing mortgagee or trustee in bankruptcy."