@Jonathan R McLaughlin That's a great point of view. We don't want to pursue a legal action. On the other hand, we want to make sure that all rents are paid in full. I acknowledge there were issues in past and we worked with them as well. Heating issues were resolved.
From my verbal conversation with the tenants, they want to withhold money and want us to use some part of their security deposit.
Our lease also says, "If the notice is given later than required, Rent is due for the entirety of the renewal term" The notice should have been given to us in end of April and we understand there was a lot on uncertainty because of COVID-19. Again, at that time tenants wanted to renew for an year and changed their mind later. We are happy that they are buying a house.
A local landlord is suggesting to post an eviction notice or notice to quit for last 3 days for late payments of rent and inadequate notice to vacate. I haven't. This notice would demand the 2 month rent upfront (1 month is past due) and 3 month utilities security deposit (1 not billed, 2 not use). In this case, tenants are paying money 15 day upfront.
What you think about that? Or we should take a mellow approach. Again, we don't want tenant to think that security deposit is their rent. Any other suggestion that don't violate their rights and get our point across?