@Tom Gimer   Maybe Tom can give you some guidance.I have personally had a few title claims that had to do with encroachments and being land locked and they got worked out but not without effort and time.Title companies cured them though. 

What pathway do they have to cure their inability to obtain a mortgage? 

Typically a default notification will tell you the reason for default and indicate a cure time (30 days typically).

I don’t know if there is some science test for concrete PSI after cured, there is a standard there as well, seldom asked for the ticket, but they could want that.

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It will expand as it cures and actually cause the area above to rise a little, maybe a few inches...but that might be enough.

A Pay or Quit notice goes out on the 8th from our attorney, personally served, and the tenant is charged an additional $250 to cure if they intend to redeem themselves.My rental are mostly in L.A.

QCDs should primarily be used for transferring property between family members or to cure a defect on the title, such as a misspelling of a name.

And you wouldn't necessarily have to have a m2m form to make it work - if paying late (or unpaid late fees) are a default of the lease, you could (*if* I understand the new law, ianal) send a notice to cure (as set forth in your lease), and unless the $$ are paid in full you could then cancel the lease and start a holdover action. 

Concrete cures slow (it can take hundreds of years actually) but sets up relatively quickly and they shouldn't be able to put their handprints or footprints in it or write "F You" in it after it's been curing for half a day.