This is a perfectly normal request and also perfectly reasonable. They'll also expect very clear steps on how to install it and get it running. Consider the s

This is a perfectly normal request and also perfectly reasonable. They'll also expect very clear steps on how to install it and get it running. Consider the scenario from the clients perspective. They are being asked to base a portion of their lively hood on a small company. They just want to make sure they can continue to function if you get bought and shuttered, or go bankrupt. I'm not sure what reservations you'd have. I mean a trustee's entire value is in their reputation, so if they give away your source code they are done. I'm going to guess your source code isn't what some lawyer wants to end their career on. Maybe turning the question on its head, what possible reservation would you have with this?