Britney Spears Demands Jamie Spears Sit for Deposition

Britney Spears says her dad has been ducking for cover so he doesn't have to sit for a deposition, detailing his conduct in the conservatorship case, but now her lawyer says they're calling Jamie's bluff.

Jamie has said he would sit for a depo, but only in Kentwood, Louisiana. Britney's lawyer, Mathew Rosengart, says in legal docs, he'll gladly fly to Kentwood to put Jamie under oath.

Rosengart says in new legal docs, obtained by TMZ, that Jamie has been skirting the depo for more than 5 months, and he thinks for good reason. Rosengart claims he can prove Jamie was running "a corrupted and conflicted conservatorship that stripped his daughter of certain fundamental liberties," adding Jamie enriched himself to the tune of at least $6.3 million and paid various people involved in the conservatorship tens of millions of dollars more.

Rosengart goes on to claim Jamie "continues to harass and bully Britney Spears by, among other things, failing to cooperate with his discovery ... and actually noticing his daughter's deposition, even as he hides from answering essential deposition questions."

TMZ broke the story ... Jamie wants Britney under oath to challenge her allegations.