I’ve got plenty of those too, mostly Microsoft and Cisco plus PMP, all of which I let expire because I have no use for them anymore.

When I was younger the company I worked for got into installing and maintaining EMR/EHR software at a time when the government was giving out cash to switch over from paper records. So a million little EMR/EHR software companies spun up all with their own certifications and most of which only barely adhered to HL7 to be able to send info to other health systems.

The owner of the company decided to send someone to get certified in a bunch of them that he was betting would pay off. I got paid to sit in a room and get free certifications for a year on and off because I volunteered. He was grooming me to take over a whole healthcare support division he was spinning up. Those companies folded and I ended up supporting Allscripts and NextGen without a team.

The next big idea he had was for supporting Seismic and Geological software. So while my certs for Kingdom IHS are still good, I never used them because all the oil companies had in house people supporting that plus support from S&P.

Plus my certificate from bartending school (for fun, not for money).