CAF are stepping up their testing of players at age group levels in order to expose those turning out in the wrong age groups.
The draw for the African Nations Championship was conducted on Wednesday, with hosts South Africa to face Mozambique, Nigeria, Mali.
Mali earned their second successive AFCON bronze as they dispatched Ghana 3-1 at the Nelson Mandela Bay Stadium on Saturday.
Mali and Ghana will lock horns for a fourth time in two AFCON tournaments in the 2013 third-and-fourth-place play-off on Saturday.
Nigeria hardly gave it their all as they whipped Mali 4-1 in their AFCON semi-final match at the Moses Mabhida Stadium on Wednesday.
Nigeria will be looking to end their run of third-place finishes at AFCON when they take on Mali in the semi-finals on Wednesday.
Mali booked their place in the AFCON semi-finals thanks to a penalty shoot-out victory over South Africa after the 120 minutes ended 1-1.
Mali secured an AFCON quarter-final against hosts Bafana Bafana, as they overcame an early setback against DR Congo to draw 1-1.
Ghana took a big step towards qualifying for the 2013 Africa Cup of Nations quarter-finals after seeing off Group B rivals Mali on Thursday.
Ghana will be out for their first win at AFCON 2013 when they face Group B leaders Mali at the Nelson Mandela Bay on Thursday.
Seydou Keita netted an 84th minute goal to secure a 1-0 win for Mali in their opening Africa Cup of Nations encounter.
West African neighbours Mali and Niger meet in Port Elizabeth for their first Group B match on Sunday at the Nelson Mandela Bay Stadium.