Teen Mom Facing Eviction

The company that owns Amber's rented home in Anderson, Indiana filed notice with the court on Tuesday that it wants her out ASAP.

According to the docs, Portwood somehow violated her lease agreement -- no specifics are listed -- and the landlord delivered a "notice to vacate" on Dec. 20 ... the day AFTER Amber got hauled off to jail for alleged probation violations.

Portwood's attorney tells TMZ he didn't know about the notice, so couldn't comment. If Amber misses a Jan. 25 court date she could be evicted immediately.