The letter had informed the Commission of the schedule of APC Congresses and Primaries to elect Party candidates for the 2019 General Elections.
Yekini Nabena, APC National Publicity Secretary, in a statement sent to DAILY POST on Friday condemned the release of the letter by unknown officials of the electoral body.
He said: “These leaks of our sensitive and confidential correspondence to INEC is becoming commonplace and totally unacceptable.
“We strongly request that INEC looks into its internal handling of official correspondence and put a stop to these leaks.
“While the leaked formal notification to INEC has been done by the APC pursuant to the provisions of Section 85 of the 2010 Electoral Act (as amended), we advise the general public particularly the media to wait for an official announcement from the Party as the leaked dates are subject to changes, if necessary.”