judgement mortgage

I own an investment property with a friend of mine from a few years back. My friend is in some financial difficulty and his bank is pursuing him to get a judgement against him. (its the same bank as we got the mortgage from)

I'm just wondering how a judgement against his half of the property would affect the sale of the property?

Currently its in some negative equity and I would be looking to sell up as soon as I can break even from it.

Im concerned that the bank could stop any sale until the judgement mortgage can be paid from the proceeds of the sale.....

Is the property owned as joint tenants or as tenants in common?

Tenants in common I believe....does it make a difference?