let me ask you: you need to see a doctor (say); do you interview them? do you ask them tech questions to see if they are 'real'? do you ask for their degrees and grades? how about lawyers? how about other professionals?
I'll ask questions on contractors, but I'm NOT going to ask for 'what school did you go to'. not once, not ever, not for any field where I would hire someone (that would work for me).
I've always thought that was a double standard. seeking jobs in engineering, the companies want to know about my degrees, but if I seek a doctor, its just NOT DONE - to ask for their quals.
so, ymmv (seems regional, at least) but the only time I've been asked about my degrees is at point of hire into a job. once I'm hired, its no one's business (esp. not clients!) what my exact background is.
I find it very odd that people think they have a right to invade employees backgrounds, even to that (light) level. the company hires you and its their job to select good people. a step disconnected from that is when a client hires a company. he selects that company based on what he thinks they can do, but prying INSIDE the company just seems outright wrong and way too micro-managing to me.