This document produced by Policy and Legal Advocacy Centre (PLAC) with support from the European Union (EU) provides a detailed guide on making a petition to the Senate Committee on Ethics, privileges and Public Petitions. The Public Petitions Committees of the National Assembly perform a quasi-judicial function. They are generally mandated to investigate petitions from Nigerians on any issue or matter, especially the conduct of affairs of government agencies. A petition is a formal request for action from the National Assembly to redress rights violations, administrative breaches or infractions committed by public officers or authorities. There is no specific format a petition may assume. However, it is expected that a petition must be intelligible and contain relevant information on the issue(s) that the petitioner seeks to resolve.
See document here: https://placng.org/i/wp-content/uploads/2022/04/Step-by-Step-Guide-to-the-Public-Petitions-Process-in-the-Senate.pdf