Partners
In Germany the following organizations cover neighbouring collecting fields:
- ArGe Böhmen und Mähren (German protectorat Bohemia & Moravia)
- ArGe Deutsche Ostgebiete (Former German Territorries in the East)
Moreover, the ArGe Tschechoslowakei cooperates with partners abroad, who are also devoted to Czechoslovak philately:
| Czech Republic | Společnost sběratelů československých známek SČF Českomoravská společnost pro poštovní historii |
| Slovakia | Zväz slovenských filatelistov (ZSF) |
| Denmark | Tjekkoslovakiet Samlerne Danmark |
| Great Britain | Czechoslovak Philatelic Society of Great Britain |
| The Netherlands | Vereniging voor Tsjechoslowakije-Filatelie |
| Hungary | MABÉOSZ Cseh és Szlovák Szekciója |
| USA | The Society for Czechoslovak Philately (SCP) |