She said the peaceful conduct of Ghanaians sent clear and powerful message of faith in constitutional democracy.
Mrs Osei was speaking at a stakeholders' meeting at Agogo in the Asante-Akim North District to discuss the need for all to continue to sustain the peace.
The programme, organised by the NCCE with support from STAR Ghana, was attended by representatives of the various political parties, civil society organizations, chiefs, assembly members and students.
Mrs Osei said the petition had brought into sharp focus the need for reforms to improve the electoral system and sustain the country on the path of democratic growth.
She called for tolerance, political accommodation and fair play which, she said, were the pillars of multi-party democracy.
Mr Samuel Akuamoah-Boateng, Director of Programmes at the NCCE, said more should be done to help the youth to engage in productive ventures so as to become less susceptible to political manipulations.
He stressed the need for responsible journalism to hold the nation together and remove tension and division.
Mr George Kyei Barffour, a Local Governance expert, called for continued stakeholder engagements to safeguard the peace.
He said although there was relative peace, the nation was still polarized and that was the more reason why Ghanaians should avoid complacency.