The clawback is the fly in the ointment of any PIA. Many PIPs and even MABS gloss over the full implications. Makes insolvency a harder sell.
Clawback will be the amount which is the difference between your written down mortgage and the amount of debt that was specified on your Protective Certificate. Gotta love they way they call it a "protective" certificate. At this stage now, you can see who it protects.
If you sell your house for more than the existing (post PIA) mortgage balance, clawback will be triggered up to an including the total debts specified on your PC.