Legal Question in Real Estate Law in Missouri

There may be factors in the agreement between you two that change the responsibility of her liability for rent and utilities. But, based upon the few facts you provided, the landlord can come after her for all of the past due rent, and the utility companies can come after her for all the utility bills, including after she nived out. As Ling as her name is on the account, she may remain liable to them. You may only be able to sue her for half of the rent and utilities for up to one month after she left. You should consult directly with a civil practice attorney in your area, before deciding what to do. You need advice from someone who can read your lease agreement and discuss the agreement you and your girlfriend had regarding splitting the bills.

Good luck