Building off of the situation in this previously asked question...
I am in the process of interviewing for other job opportunities. My boss is aware that I am most likely looking for other work because of the current lack of pay. He has been very cool about it because he empathizes with my situation. He tried his best to get me more but upper management wouldn't budge. Note that this is also my first job in the software development field and I currently have 18 months of experience.
I'm at the point where I am speaking with a recruiter and he has asked if I would be able to obtain a reference from my current employer. Despite being good friends with my boss, I am not comfortable asking him to be a reference. This is because I recently asked if he could speak to upper management about becoming a full-time employee. I've always been seeking new employment but opportunities haven't really shown up until recently. If I do find new employment, I intend to give him one month notice as a courtesy because he has been an excellent supervisor.
Now, I do have a recommendation letter from him that he updated recently for a scholarship award that I actually won. Is it wrong (or even illegal) to pass this on to the recruiter as a reference? Would a recruiter even accept this? I wouldn't change anything in the letter because I'd want it to be clear that this was used for a separate occasion. However, I'd really like to have some evidence of my abilities and personal character from a professional I've worked with and not just professors that I've studied under.