Luis Advíncula will not be able to make his Tigres debut against Chiapas in Tuxtla Gutiérrez this weekend.
Advíncula, who completed a specialized training session under the watchful eye of Guillermo Orta this morning, has not been registered as a player by the club.
It is now too late to complete the paperwork in time for the trip to Los Jaguares.
It means he will have to wait until the home game against Toluca next weekend before he can make his bow with his new side.
Kick-off at the Estadio Víctor Manuel Reyna is at 5pm on Sunday evening. Chiapas have won one and lost one of their opening two games. Their Jornada 1 game against America was postponed.