The hold up was due to the Catalan institution who were reportedly still waiting to receive his transfer fee of €222 million.
Mbappe, 18, scored 15 times on Monaco's remarkable run to the French title last season, but has been constantly linked with a move away from the principality over the summer.
It's been almost a week since Neymar landed in Paris, and the world's most expensive player still can't play for his new club in the French league.
PSG are keen to partner Mbappe with Neymar in attack, which could see Edinson Cavani move out wide or drop to the bench, despite the Uruguayan's scoring 49 goals last season as the club's main striker. And based on recent reports, he could stay in the Ligue 1 in the near future.
Saying that, an average win over a poor side didn't really tell us much about this PSG team, and we should get a better idea of their performance levels following their game with Guingamp, especially if Neymar makes his debut.
PSG have, however, already been busy this summer adding the likes of Neymar, Dani Alves and Yuri Berchiche to their ranks and will not be tabling a bid for another high-profile addition. "We want him in the squad, and in the starting 11".
Spanish league officials initially tried to block the deal after PSG triggered the release clause for the 25-year-old's contract, claiming the French club was breaking the Financial Fair Play rules set by UEFA, European football's governing body. Furthermore, it would be foolish to say Guingamp have absolutely no chance, especially when looking at previous encounters between the two sides.