What if there are 2nd mortgages and other liens on Foreclosure?

[Elena Pech]

Hi, I found a very attractive property in a nice neighborhood that will be sold on Foreclosure Auction. 

What do I need to check or to be concerned of from financial perspective? I checked bills and taxes.

What about the title? What if there are other mortgages and liens on this house? Who is responsible for it? Logically person in default should be responsible for all other debts, but I want to clarify.

What other financial tricks can be involved?