10000 Francs CFA

The BCEAO's practice of printing signature combinations directly onto the face — rather than issuing notes by country — reflects the union's unusual structure: eight member states share a single currency and a rotating cast of national finance ministers signing alongside a common central bank governor. The result is a long signature matrix spanning two decades on a single design series, with 2011 alone producing two distinct varieties under different minister pairings.

José Mário Vaz, who appears on the 2010 and 2011 dates, later became President of Guinea-Bissau in 2014 — an unusual trajectory for a signatory on a circulating banknote.