I took my CNA, CMT, or Insulin exam several months ago, but I have never received my certificate.
Contact the school or facility where you took your exam. The association who issued the exam normally returns the certificate to the school/facility where you took your exam. If the school/facility paid for the certificate, they may not want to give it up. However, you may call the Health Education Unit at (573) 526-5686 or go to the CNA Registry Search page and find out which certifying association printed your certificate.