This is a brief summary of a discussion I have been having on another forum, and I thought some members here might be interested or have additional insight on this topic (especially the brokers here, and other people from the banking industry).
Some people (normally property bears) like to suggest that banks can 'call in' or 'margin call' or repossess the homes of borrowers who end up in negative equity simply because (through no fault of the borrower) house prices happen to fall/crash. They claim the banks can do this even if the borrower is keeping up with his repayments.
One person has pointed to a statement in this CBA document to back up his claim. His document says...
It should be noted that the CBA document quoted above is not a contract - it is just an information booklet about home loans, and therefore non-binding, and not a legal document. Clause (c) is actually there to cover circumstances where a revaluation is triggered, for example due to the borrower knocking down the house. A general fall in house prices would not trigger a revaluation, and the CBA booklet doesn't even claim that it would.
In fact, the NCCP Act 2009 actually makes it quite clear that banks can't 'margin call', or repossess, or force the sale of a residential property unless the borrower has defaulted on repayments and subsequently failed to comply with a request to remedy that default.
National Consumer Credit Protection Act 2009
Furthermore, ASIC stipulates the following conditions...
And regardless of the fact that banks have no legal right to take such action (repossession, forced sale etc) against homeowners who are not in default, it wouldn't be in the bank's interest to do so anyway. A loan is an asset to a bank. It would make no sense for a bank to repossess the home of a non-defaulting borrower and then force the sale of that home for less than the value of the loan. It wouldn't help the bank's balance sheet or financial position in any way.