United's decision to fine the Argentina international two weeks' wages will complete an unhappy year for him at Old Trafford.
His move to the French champions is expected to be completed when he arrives in Paris from Buenos Aires for a medical and to sign his contract in the next 48 hours.
United are now set to press the button on a £22m deal for Barcelona's unsettled Pedro Rodriguez as a replacement.
They have taken a £15m hit on Di Maria who they bought from Real Madrid for a British record £59.7m last August.
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Manchester United look set to switch Pedro (left) for PSG-bound Angel Di Maria
Di Maria failed to settle at United, on or off the pitch, but PSG's former Chelsea defender David Luiz, a friend from their time at Benfica, says he is still a world-class talent.
Luiz said: "He is a great friend, a great player. Every single team he plays in, he makes the difference, helping on the defensive side also. He knows how to assist, to score goals.
"I played with him in Benfica. It's great to see how much he has improved, how he has become a fantastic player. It would be a pleasure to play with him again."
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