The Daily Mail says Ozil's father and advisor Mustafa is taking legal action against an agent over what he claims is a forged mandate offering the Germany international to United on August 7.
However, a genuine mandate signed by him was presented to the club in mid-August but United decided not to go ahead with the deal after taking 48 hours to consider the offer.
It is understood that Moyes was looking for a midfield general and was not convinced that Ozil's style fitted the type of domineering player he needed.
Even though he had passed a medical for Arsenal while on international duty in Munich and flown to London to complete the transfer, Real were prepared to do a deal with United as late as 8pm with Ozil understood to prefer a move to Old Trafford.
However, contrary to reports today, although United considered the offer they did not attempt to hijack his move to Arsenal with a late bid.
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