The ECOWAS Commission has encourage the contenders in the elections to accept the outcome of the polls.
It has also urged any aggrieved parties to seek redress through laid down rules and regulations governing the electoral process.
In a statement, the Commission noted the importance of the presidential election to the region and the African continent at large.
The statement also commended the Independent National Electoral Commission (INEC) for introducing the Bimodal Voter Accreditation System (BVAS).
It applauded the presidential candidates for subscribing to the first and second Peace Accords facilitated by the National Peace Committee.
Reporting by Hamza Alkali; Editing by Abdullahi Lamino and Tony Okerafor