For me, it's not about being right or wrong, it's about getting to the truth.
This thread has demonstrated that...
1. It is not legally possible on normal P&I residential home loans, including investment property loans (i.e. the vast majority of mortgages)
2. Nobody can provide an actual regulated mortgage contract that includes such T&Cs
3. There is no evidence of it ever happening, apart from anecdotes from the nineties (probably unregulated loans), or commercial property anecdotes
4. It would rarely be in the banks interest to do it anyway
This threat hasn't demonstrated that
1. Not been demonstrated
2. See the ING document above
3. maybe
4. I agree
Now, if you want to continue your research you should seach for caselaw of 'unjust contracts' and on that section of the NCCP which covers this - cl 81??
Schedule 1 of the NCCP is actually the old UCCC so it has been around for ages, so you should be able to find to actual cases.