Repercussions of unable to repay the Mortgage - whats worst that could happen?

All Greetings!

Apologies for asking a real dumb question.

What would happen, if a person is unable to pay his mortgage and just walks outta the property?

* Re-possess the house and log the person's name in the credit-history register

What else will/can the bank do? What else worse could happen?

tia

This is Ireland, so they will be after you for any shortfall after selling the house and deducting all their costs from the proceeds.

If a person owed you a certain sum and then paid you only part of it would you just say goodby to him/her