Does a Citibank checking plus line of credit go to collections if one continuously fails to make a payment?

I know that a loan falls to a collection agency and gets written off after 120 days of delinquency but is a Checking plus line of credit the same in this manner? I’m asking because when my loan fell to the collection agency I paid 35% and it was settled so I’m curious if I [...] http://bit.ly/mRy1EE