The late singer's nephews TJ and Taryll - members of 3T - have suggested that an impersonator features on the new recording.
On his Twitter page, TJ said: "Deceptively merging shady vocals with MJ samples (from prior MJ records) will never fool me. Why they would ignore the obvious, look the other way and rush a suspicious track that was NEVER on my Uncle's radar is beyond me (sic).
"I'm disgusted, disappointed and saddened. And before the media starts to smear our name, just remember we are COMMITTED (as our Uncle Michael always knew) to protect his name and his amazing legacy he worked his whole life for."
He added: "Sounds like Jason Malachi to me too. The vibrato is a dead give away that it's not my uncle. Fans, I am so sorry you were put through this If you heard the acapella you would be even more disgusted.
"Sampled breaths after sampled breaths mixed in with fake vocals to try to fool u They said this is 100% my Uncle. Not 70, 80 or 90 but a 100%. Every line, every word. My Uncle's legacy didn't deserve this!"
Taryll said: "I was at the studio when these questionable files were delivered. I heard these 'so-called' Michael Jackson songs raw and without the distraction of the well produced music by Teddy Riley.
"How they constructed these songs is very sneaky and sly. many people who have worked on this project either have strong doubts and questions while others KNOW the truth yet decided to turn and look the other way with their hands out for $$$.
"There are songs that ARE my uncle singing on the upcoming album and I will support those 100%. But I will not support 'Breaking News' and a few others because it simply is not him. They tried to fool me and they tried to fool you. I told them it would never happen."
However, a Sony Epic Records representative said that the label had "complete confidence in the results of our extensive research as well as the accounts of those who were in the studio with Michael that the vocals on the new album are his own".