On Monday I intend to resign from my current position. I'm a consultant, and nearly always placed on site. I very occasionally have a boss on-site with me and another that always works managing the development team in the "back of house" a couple of hours away from my location. Both are considered equal partners and both were equally involved in my hiring process.
What is the professional approach when resigning here? I've thought about writing an e-mail and titling it to both of them, but it doesn't seem appropriate for this kind of situation. Would it be ok to just ask to meet the boss that comes on-site on Monday and only have the discussion with him or should I invite my other boss also (a very significant round trip for him)?