frrom www.tmzs.com - TMZ has obtained a copy of a legal document that Joe Jackson has sent to Dr. Conrad Murray -- a prerequisite to filing a wrongful death lawsuit ... in which Joe claims Dr. Murray had been drinking at a strip club hours before he allegedly administered a fatal dose of Propofol to Michael Jackson.

According to the document, "On June 25, 2009, prior to treating Michael Jackson, defendant was at a 'strip club' called 'Sam's Hofbrau' in Los Angeles where he had been 'drinking.'" The doc goes on: "It was reckless for him to 'drink' prior to administering anesthesia to Michael Jackson. He concealed his conduct from Michael Jackson."

The doc, written by attorney Brian Oxman, outlines Murray's treatment and the medical emergency that ended in Michael Jackson's death.

According to the document, Michael had "neurological, pulmonary, and anemia signs over several weeks prior to his death. In May and June, 2009, Michael Jackson was confused, easily frightened, unable to remember, obsessive, and disoriented." Oxman goes on: "He had impaired memory, loss of appetite, and absence of energy. He was cold and shivering during the summer rehearsals for his show ..."

Oxman claims these problems were caused by Dr. Murray administering a "polypharmacy" of drugs (multiple meds) to Michael. And Oxman claims, Dr. Murray "ignored the signs of Michael Jackson's pulmonary inflammation, brain swelling, and anemia."

Oxman alleges Murray repeatedly lied about the drugs he administered to Jackson and withheld vital information from EMTs and doctors who were trying to save Jackson's life. He repeated all of the alleged inconsistencies that have been previously reported.

Oxman says of Dr. Murray, "His conduct was inhuman. It was an extreme violation of the standard of care."

We're told Dr. Murray received a copy of the document in March. Dr. Murray's legal team tells TMZ, "The allegations are absolute, utter nonsense."

And people close to Dr. Murray insist he does not drink ... ever.

We're told the document was served on Dr. Murray on March 27, 2010. According to California law, Joe Jackson must wait 90 days from the date the document is delivered before filing an actual wrongful death lawsuit. The 90-day period is up Friday, the anniversary of Michael's death.

Update: from www.tmz.com - A rep for Dr. Conrad Murray's defense team tells TMZ Joe Jackson's lawyer is flat-out wrong when he claims Dr. Murray was drinking at a strip club hours before Michael Jackson died.

TMZ broke the story ... Joe Jackson's lawyer, Brian Oxman, has served Murray with legal papers as a prelude to a wrongful death lawsuit. In those papers, Oxman claims Dr. Murray was at Sam's Hofbrau -- a strip club -- on June 25, 2009, prior to treating Jackson.

The rep for the defense team tells TMZ Dr. Murray was not at a strip club when Oxman claims, nor was he there the night before. As the rep put it, "In the weeks before Michael died, Murray barely had time to take a shower."

The rep also says Oxman got it wrong when he claimed Dr. Murray was drinking, because "He does not drink."

As for whether Murray has ever frequented the club, the rep did not know one way or the other. But one of the waitresses at the club tells TMZ Dr. Murray was at the club sometime in June of last year. A stripper who works at the club tells TMZ she vividly remembers the night before Michael died because she's a big MJ fan, and says, "It was dead that night. Dr. Murray definitely was not there."

The club's owner tells TMZ ... at least twice in the last 6 months, a private investigator came to the club and asked various employees a bunch of questions about Murray and if they remembered seeing him at the club.

Interesting note -- we're told Quentin Tarantino liked Sam's Hofbrau so much, he used it in the movie, "Jackie Brown."