A Carson woman and former United States Postal Service letter carrier pleaded guilty to conspiracy to commit bank fraud after admitting to stealing checks and credit cards from the mail over a three-year period. Mary Ann Magdamit, 31, worked at the Torrance Main Post Office and has been in federal custody since July 1.
According to court documents and her plea agreement, Magdamit stole mail containing checks, personal identifying information, and debit and credit cards between 2022 and July 2025. She activated stolen bank-issued cards online for purchases, sold some of the stolen cards to co-conspirators, and arranged for others to cash stolen checks using counterfeit identity documents. The scheme targeted federally insured banks and credit unions.
Law enforcement searched Magdamit’s apartment in December 2024, seizing 133 stolen credit and debit cards, 16 U.S. Department of Treasury checks, luxury goods purchased with stolen funds, and a loaded un-serialized Glock-clone firearm known as a “ghost gun.” Investigators also found evidence that she used the stolen cards on international trips to Turks and Caicos and Aruba.
Agents arrested Magdamit on July 1 after discovering she continued making purchases with victims’ credit cards. A second search of her apartment yielded additional stolen cards. Authorities noted that Magdamit posted images on Instagram showing luxury purchases, vacations, and large amounts of cash. She has agreed to forfeit a Rolex watch along with other luxury items.
United States District Judge John F. Walter set sentencing for October 27. Magdamit faces up to 30 years in federal prison.
The investigation was conducted by the U.S. Postal Service Office of Inspector General, the U.S. Postal Inspection Service, and the Treasury Inspector General of Tax Administration.
Assistant United States Attorney Andrew Brown is prosecuting the case.
“Magdamit posted on Instagram her luxury purchases and vacations, and flaunted stacks of hundred-dollar bills. Magdamit has agreed to forfeit a Rolex watch and other luxury goods.”
“United States District Judge John F. Walter scheduled an October 27 sentencing hearing, at which time Magdamit will face a statutory maximum sentence of 30 years in federal prison.”
“The U.S. Postal Service Office of Inspector General, the U.S. Postal Inspection Service, and the Treasury Inspector General of Tax Administration investigated this matter.”
“Assistant United States Attorney Andrew Brown of the Major Frauds Section is prosecuting this case.”
