| Nominativ | congratulatio, congratulatio | congratulationes, congratulationes |
| Genitiv | congratulationis, congratulationis | congratulationium, congratulationum, congratulationium, congratulationum |
| Dativ | congratulationi, congratulatione, congratulationi | congratulationibus, congratulationibus |
| Akkusativ | congratulationem, congratulationem | congratulationis, congratulationis, congratulationes, congratulationes |
| Ablativ | congratulatione, congratulatione | congratulationibus, congratulationibus |
| Vokativ | congratulatio, congratulatio | congratulationes, congratulationes |
