Please contact me if you need help getting a property profile and I will be happy to assist.
A more detailed answer is: it depends upon whether she closed via an escrow company, how she recorded the docs, if a new note was created (and how it's structured), whether she had set up a title-holding trust to hold the deed/deed-of-trust, whether she sold any part of a note, etc.
You can call the bank to find out when the Balloon is coming due or the Title company
In the records you have.
Check whether the Realtor or his Broker is still in business.
It's possible it may eon micro fiche.
If the sale was done years ago, it's unlikely the files are still around.
Generally, destroyed after seven years.
Chances are the only thing that is filed with the County Clerk is a Memoradum of Land Contract and not the full document.
The best place to check for the full document is at the Title Company where you closed the sale. They should have a full copy in their files. The other possiblity would be to contact the Realtor or the Company that helped her sell the Condo. There is a good chance they would have a copy also.
Good luck. If you have further questions feel free to contact me.