Whether or not your real estate agent is due a commission for the rental that you have as a tenant depends upon if you signed any agreement with her concerning this or if the presumed written lease that you have for the unit states anything about commissions.As such I suggest that you carefully read all agreements concerning the rental that you and the landlord signed to see if there is any mention of real estate commissions. If your agent wrote you a note stating that you are not responsible for her commissions, it would appear that you are not by this admission.