Usher and his ex-wife, Tameka Foster, are California residents now ... so Tameka wants her custody agreement to be registered there.
According to court documents obtained by The Blast, Foster filed a registration of out of state custody order to move the agreement from Georgia to California. She says both her and Usher have moved from Georgia since the order was first agreed to in 2009.
The docs also note, "A modification of support child support may be appropriate due to change of circumstances."
Our sources say Tameka will not be looking for more money.
Usher and Tameka were married in 2007 but divorced just two years later. They battled out in court for years over custody of their two children, Usher V and Navivyd Ely, with a judge eventually awarding Usher primary custody.