Jamie is reportedly seeking to keep her medical records sealed, as he claims he's worried they could have a detrimental effect on Britney if they are made public.
Britney's father also believes giving the public access to her medical records could have a negative impact on her two children - Sean, 14, and Jayden, 13 - whom she has with her ex-husband Kevin Federline.
Jaime's new documents also address the recent statement made my Britney's lawyer which states the singer wants more "personal autonomy" in her life, as he claims her conservatorship is voluntary and she can file a request to terminate it at any time, but hasn't up to this point.
Britney's conservatorship was recently extended until at least February 2021, after a judge allowed the singer and her legal team to file a petition no later than September 18 and have it set for hearing on October 14, where further discussions into the future of her conservatorship will take place.
Last month, the Womanizer hitmaker said she was "strongly opposed" to having her dad return as sole conservator and would "prefer" for her current conservator, Jodi Montgomery, to stay in the role.
Jodi took over from Jamie last year when he temporarily stepped down due to health reasons, but he is now looking to take up his position - which puts him in control of many aspects of her life - once again.