At the Etoudi Palace, there are only two institutions, the Private Office and the General Secretariat. There is no “Office of the Father-In-Law of the Head of State. The calling card which went round on social media is a fake and its user had been arrested. He will have to pay for his crime.
For the most suspicious ones around, the website Cameroon-Info reminds here the details of the organisation of the Office of the President, according to the presidential decree signed on 9 December 2011. No trace of any Father-In-Law.