La Toya Jackson -- I Didn't Loot Michael Jackson's House After His Death, Threatens Lawsuit

La Toya Jackson insists ... she did not raid Michael Jackson's home just hours after his death, pillaging plastic bags filled with cash -- and now, she's threatening to sue a major magazine for saying otherwise.

La Toya has fired off a cease-and-desist letter to Vanity Fair, claiming its recent article entitled "Estate of Siege" is "replete with misstatements of fact, false innuendos, and defamatory insinuations."

According to La Toya's letter, the article falsely claims she showed up at MJ's Carolwood mansion shortly after his death and loaded plastic bags filled with cash into a duffel bag. The VF article goes on to describe La Toya's bf leaving the home in a moving van.

La Toya claims the article describes her visit as a "mad scramble for money" -- strongly insinuating she stole large sums of cash from MJ's house.

According to La Toya ... the allegations are nothing but lies and she wants a full retraction asap.