| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 907 | Cerda Luis | República Dominicana | 1 | 30/01/2014 |
| 745 | Cepeda Eva | España | 2 | 12/11/2009 |
| 443 | Centeno Mario | España | 14 | 16/03/2010 |
| 111 | Cedano Velasco Orlando | Colombia | 657 | 23/08/2012 |
| 828 | Cecchini Liliana | Argentina | 1 | 02/10/2016 |
| 468 | Ceballos Juan | Colombia | 13 | 10/02/2010 |
| 361 | Castro Besnier Germán | Chile | 69 | 23/05/2021 |
| 314 | Castillo Edin | Chile | 13 | 22/10/2009 |
| 872 | Castells Rosa | España | 1 | 24/11/2015 |
| 956 | Castellon Pineda Juan Tomas | Colombia | 1 | 16/03/2012 |
| 731 | Castellares Eva | Perú | 3 | 10/06/2010 |
| 1010 | Caso Jordi | España | 1 | 22/01/2014 |
| 395 | Casasnovas Codina Andrés | España | 32 | 07/04/2014 |
| 170 | Casas Montero Francisco Javier | España | 480 | 02/11/2018 |
| 821 | Casado Burgos Rafael | España | 1 | 06/03/2013 |
| 624 | Cartier Maxi | Argentina | 4 | 14/10/2011 |
| 92 | Carro Antonio | España | 555 | 20/05/2009 |
| 304 | Carrillo Nicolas | Argentina | 30 | 12/09/2012 |
| 898 | Carranza Javier | Colombia | 1 | 13/07/2016 |
| 376 | Carpintero Sanchez Jesus | España | 156 | 26/05/2015 |