The victim was on Sunday, June 18, killed by suspected kidnappers operating along the Ishiagu/Mpu road and abducted his wife.
Mr Obi and LP are complainants in the petition marked CA/PEPC/03/2023, challenging the election which brought Mr Tinubu to power on May 29.
Former Vice-President Atiku Abubakar and the Peoples Democratic Party are claiming widespread fraud in the February 25 presidential poll.
The court accepted and adjourned until June 22.
INEC made the declaration before the court sitting in Abuja on Tuesday.
The documents in question include the state collation sheets of the 36 states and Federal Capital Territory (FCT).
Mr Tinubu was on March 1 declared winner of the February 25th presidential election by the Independent National Electoral Commission (INEC).
The tribunal then cautioned counsels to LP and INEC to cooperate more instead of lamenting and wasting the time of the court.
The witnesses all agreed that other aspects of the election went well until it was time to upload the presidential results, and then the BVAS machines refused to work.
All the witnesses who worked as INEC adhoc staff during the presidential election said they were unable to transmit election results from their BVAS machines as stipulated.
