Also, the additional income being on the books will allow you to more easily qualify for a loan down the line as well as you will have more documented income.

The realtor asked you to submit an offer?

When providing a lease renewal we provide 4 options - sign a 1 year lease for a lower increase, sign a month to month at a higher increase, submit a move out notice if you wish not to renew, or choose to do nothing and receive the highest rent increase (with a clause that once they select from the other 3 options the rent amount will be adjusted accordingly not not made retroactive)

Anytime a change or documentation is requested from a third-party, our process is to reach out to the client and confirm before we take action.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

You can check the documentation, permit info, warranty etc. or often there is an owner’s manual inside the home and also a plaque on or near the inverter or one of the switch boxes with the company name and contact info.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Retain all copies of documents you got from them as evidence. 

The commission for the listing was negotiated between the seller and the FIRM prior to any offers being submitted.

Once it sells your qualified intermediary can provide all the documentation needed for the lender.