Lease renewal validity amid change in management

[Lisa W.]

Hi there.  In mid-November I 'fired' my property manager and resumed self-management of my duplex.  The property manager had sent the tenant a lease renewal in October, to be returned by end of January.  I recently pinged tenant with a reminder, as I haven't received it yet.  She wrote 

"At no time in the process of separating from [mgmt company] did you mention that we were going to continue any of the contract elements. I recycled the rental agreement assuming that if you wanted to have one with me that you would let me know. I believe that you are obligated to write your own, one which identifies you specifically as the landlord."

I believe she's incorrect in her assumptions, in that the management company was acting as my agent. 

Would appreciate confirmation (or not) from folks here.  Thanks much!