Thanks for the tag, Luke. I wouldn't say it needs to be like a resume but something specifically catering to your audience: brokers. Namely, outlining 1) what - if any - deal experience you have, 2) where your capital is coming from (and some high level on your investors), and your experience managing teams/companies/divisions. Some combination of the above should suffice and can be formatted into a 1-page document.

Thanks for the tag ^redacted‌. From experience, this is not too unusual a request if you're deeper into the process, e.g. final checkbox before LOI acceptance. But if you're getting this request early in the process, I would say the problem is upstream - the broker lacks confidence in you for some reason, and is looking for formal credibility markers. Essentially, you've already "lost" if you get to that point, which may be why you're also getting resistance on proof of funds, etc. If that's the case, I would focus more on improving your initial pitch. The broker / seller should be able to tell within the first 15 min of initial phone call that you know your stuff, and are not a tire kicker.