Does the defaulting party have a right to cure?

They could have cured you the minute it didn't close per the contract and then went with a new buyer.

Now fast forward 5 months he cannot secure finacing.We recommend our prefered lender and lender asked him to submit his wifes docs which he never did.We have been reminding him 60 days ahead to secure financing and to get into a written contract with us.We send him a non renewal of lease letter 60 days prior .He took it lightly.Today i send him a notice to vacate and a cure or leave letter for extra dogs that i noticed in registered mail .He texted me saying he is really intrested in buying the house and open for our owner finance with low down payment as he donot gave any money.

Mold problems get worse exponentially faster until they are cured.

If after 3 days(just like a 3 day notice to cure) you will be forced to file a complaint with the Indiana Real Estate commission.

Still if you are convinced of the long term value time cures a lot of mistakes.

Every states process is a little different, but basically the process starts with X day "notice to vacate" or "notice to cure or quit" or "notice to pay".

The  notice of default article recommends a notice that gives the tenant seven days to cure.

AFter the NOD comes the NTP (Notice of trustee sale) which means the homeowner is at a much greater risk of being foreclosed on since they have not cured the NOD and the trustee sale date at the courthouse steps is closing in.

I would also send the tenant a noise violation or other lease clause with a x day notice to cure or quit.