As far as we know, Repleetah was not one of these situations...
Off the top of my head, these three things take place before the 'official' contact with the Kilrathi...
- Privateers in the Landreich start dealing with the Kilrathi (2628).
- The Kilrathi capture Fawcett's World (2628).
- Dr. Kohl observes the Sivar Ceremony on Ghorah Khar (2621).
The latter two are not recognized, of course, because Confed didn't actually know about them until much later.