Estoppel Agreement - Need some ADVICE!

[Darren Berg]

I am buying a duplex that is 1/2 rented. For the unit that is rented I am giving them an estoppel agreement. My question: In the original lease it states to make payments via check or money order to the Property management office. Once I take ownership, I will be self-managing. 

Can I include where to make the new payments on the estoppel? I want to be covered when closing on this property. Any help is appreciated!