How To Deal With A 2nd Mortgage That Has Been Sent To Collections?

I’m currently on a repayment plan on a rental property for the 1st mortgage. The 2nd has been charged off by EMC mortgage and sent to an outsourced collection company called LCS. Does anyone have any experience on how to deal with LCS and what rights I have to settle this 2nd mortgage. Can they freeze my assets? Will they seek a Judgment?