Maryland Petition Or Motion To Modify Custody Or Visitation is a legal document used to ask a court to change the existing child custody or visitation order. This motion can be used when a parent believes that the current custody or visitation order is no longer in the best interest of their child. It can be filed by either parent, a grandparent, or any other interested person. There are two types of Maryland Petition Or Motion To Modify Custody Or Visitation: Custody Modification and Visitation Modification. In a Custody Modification, a parent is seeking to change the physical custody of a child. This may involve a change from joint to sole custody, changing the primary residential custodian, or modifying the terms of the current custody arrangement. In a Visitation Modification, a parent is seeking to change the terms of the current visitation agreement, such as increasing or decreasing the amount of visitation time.