I bought it, did minor rehab, put a tenant in place at $650 mo and then sold it to a fellow BiggerPockets member.

I bought it, did minor rehab, put a tenant in place at $650 mo and then sold it to a fellow BiggerPockets member.

I have an agent who's very good at finding these deals and has helped me reach 40 units to date. 

The management told me to make the change on the lease end date to one year, initial it and have her initial it.She's refusing to answer the phone or email so I am sending the amended lease to her and will ask her to initial and mail to the coop's management company.  

Depends on whether the furnaces are old and up to date.

A lot depends on how up to date they are or if a small town with 40 year old technology still.

They did tell me that the auction won't be for at least 6 months and the property can be reclaimed up until the date of the auction if the back taxes are paid off.I've already tasked the owner with contacting the law firm and sending me an email with a breakdown of what's owed (I assume along with taxes owed, there are also some fees from the law firm, just not how much to expect)  After I get this, I'll be able to decide if it's gonna be a worthwhile investment.Assuming I decide to pursue the deal, how should I execute it so that I can finance the owner to pay off their debt without the risk of them taking my money, reclaiming the property, and then deciding not to sell it to me. 

I asked when the lease term ended  and she said that they didn't think there was an end date.

When writing a contract you will have dates and deadlines that you can get out of a contract with proper reasoning.  

As an individual occurrence I would probably have the tenant document the event on paper in their own words, have them sign and date it, then replace the item.