Braxton — who sold more than 40 million albums in her career — just filed for Chapter 7 bankruptcy in California … and in the docs, the singer claims she’s only worth somewhere between $1 mil and $10 mil … but she could have up to $50 mil in debts.

In the docs, 43-year-old Braxton lists a ton of creditors to whom she thinks she may owe money… including:

— AT&T
— The Four Seasons Hotels
— Cedars-Sinai Medical Center
— Various medical bills
— DirecTV
— Neiman Marcus
— The William Morris Agency
— Tiffany & Co.
— Orkin Pest Control
— The Internal Revenue Service
— BMW Financial Services
— ADT Security
— American Express
— Flamingo Las Vegas
— Mesa Air Conditioning
— Nevada Power Company
— Screen Actors Guild
— The Westin
— Wells Fargo Bank

Braxton also claims she may owe money to the City of L.A. Parking Violations Bureau — and the DMV in both California and Nevada.

Braxton has a storied history of financial problems — she filed for bankruptcy back in 1998 … and earlier this year, the IRS filed a lien against her for $396k.