The 17-year-old's move from Le Havre to Old Trafford has caused the French club to threaten The Red Devils with legal action.
United have refused to be moved by Le Havre's threats, insisting they want a retraction over recent comments, but the French minnows insist they are in the right.
Le Havre say they will take the case to Fifa, who recently banned Chelsea from signing players until 2011, subject to appeal, after they were deemed to have illegally signed Gael Kakuta from Lens.
But Pogba's agent insists United have done nothing wrong and they simply showed belief in the player.
"Of course, it is a nice contract. But not only money makes a young player and his parents change their country," Gael Mahe stated.
"They also look at the way people talk to them, the seriousness of negotiation, the respect shown.
"Did you know what Manchester sent to Paul's mother? Not a big cheque, but a bunch of flowers. It cost €30 but the mother has been moved. She felt trust.
"The father received a book about the club's history, while Paul got a shirt with number 6 and his name in the back. It is a symbol, but they felt Manchester respected them."
Pogba's mother Yeo also dismissed claims that they have received a new house from United as part of their move to England.
"That house story made people laugh in the hotel. Why would we be in a hotel, if we had been given a house? I can assure you Manchester United didn't give us anything," she told France Football.
"Le Havre didn't take care of my son. When Paul missed classes because he played a tournament with the team, we asked to catch it up, but Le Havre didn't care.
"We understood the club didn't have faith in him. They proposed contracts to other players, but nothing to Paul. Trust was broken."