A minute's silence will be held before Blackpool's play-off final against Exeter City to pay tribute to the victims of the Manchester terror attack.
It comes after Monday night's attack at Manchester Arena, where 22 died and 59 people were injured following an explosion at the end of an Ariana Grande concert.
All players as well as match day officials will also wear black armbands.
The EFL has also confirmed that enhanced security arrangements will be put in place for both Blackpool's final on Sunday as well as the Championship play-off final on Bank Holiday Monday.
Supporters are advised to arrive at the national stadium as early as possible on Sunday for security checks, and to avoid any delays ahead of the 3pm kick-off.
The EFL said: "The safety of supporters is of paramount importance and we will be implementing an enhanced security operation in collaboration with Wembley Stadium, the Metropolitan Police and the local authorities for this weekend's play-offs.
"All supporters are advised to arrive as early as possible to allow appropriate time for security searches upon entrance to Wembley Stadium.
"We strongly advise that all supporters arrive at the stadium no later than one hour prior to kick-off and we encourage spectators to not bring any bags or unnecessary items with them."