Jamie Spears has opposed increased security measures for his daughter's carer after she allegedly received death threats.

Lawyers for Jodi Montgomery said this week she had been subjected to threatening messages after Britney Spears' explosive court testimony last month.

However, lawyers for Spears' father, who is still co-conservator of her estate and finances, filed a response to the application for more security costs, calling on a judge to deny the request.

Montgomery has been the conservator of the pop star's person and responsible for her care since September 2019.

She was appointed temporarily when Jamie was forced to step back from the role due to ill health. Since then Spears has been fighting to have her father removed from her conservatorship entirely.

In her testimony on June 23rd, she described how she had been forced to perform and to take medication against her wishes, that she wasn't permitted to remove her IUD to have more children or get married, and called her conservatorship is 'abusive'.

Much of Spears allegations stem from incidents when her father was still responsible for her care, however she was also critical of Montgomery and other members of her management.

In the filings asking the judge to deny Montgomery's request, Jamie Spears said he is concerned about the "dangerous rhetoric" surrounding the conservatorship.

Jamie has long been painted as the villain of this case by Spears' fans and "has been the subject of innumerable and ongoing threats as well – not just recently, but for years."

However he "disagrees and objects" to Montgomery’s request for added security, which he claims could cost Spears’s estate $50,000  (€42,000) a month for an indefinite period of time.

"Mr Spears does not believe such an expense is reasonable, necessary, or a proper expense of the Conservatorship Estate," his lawyers argued, and that Montgomery "has not provided sufficient detail, specific facts, or special circumstances to justify such an expense".

The request is also "too vague and open-ended, and improperly and inexplicably seeks to shift the burden of ensuring her safety on to Mr Spears", according to the filing.

Montgomery, whose duties include overseeing Spears’s medical care, said she reported the threats to the local sheriff’s office and is making security updates to her home and office.

In the wake of Spears testimony about her mistreatment under the conservatorship, lawyers for Jamie filed a request to launch an investigation into her claims and also into the actions of Montgomery and Spears' court-appointed lawyer Samuel Ingham III, who resigned from the case earlier this week.

However, many of Spears' claims of abusive behaviour predate Montgomery's appointment as her conservator.

Montgomery’s lawyer later defended her work with the star and said she "has tirelessly acted in Britney’s best interests with the approval of her doctors and the oversight of the Court".

Since Spears testimony, her long-time manager Larry Randolph has also resigned, as has Bessemer Trust, the finance firm appointed as co-conservator of her estate.

The next hearing in the case is set for July 14th in Los Angeles.