Interesting... Well air carrier certificates are non-transferrable, so I'm wondering how you "bought one"? It might be possible to purchase the underlyng assets of the "business". However, if 100% of the Part 119 management personnel "change hands" all at the same time, then the new team and "owner(s)" must prove they are "fit, willing and able" to conduct operations with the highest level of safety. Thus a "re-certification" process is required.