Where would I get a copy of my caregiving certificate if the school I graduated from is no longer around?

I am an RT and I have to pay to have my license renewed every 2 years. If your CNA certificate is like this, you should be able to log into your board and get a copy. Not sure if CNAs have to do this.. but if so it's easy

Is this a CNA certificate? You can check with the state government, if they have a governing body like a Board of Nursing.

Perhaps any agencies you worked for? Assuming you gave them a copy....