1. having had official certification, authorization, or recognition removed or revoked
Usage: often used in professional, educational, or regulatory contexts

Examples

• The teacher was decertified after failing to meet continuing education requirements.
• The decertified laboratory could no longer perform official testing.
• His pilot’s license was decertified following the safety violation.
• The union became decertified after losing member support.
• The decertified school lost its accreditation status.
• She had to retrain at a different facility since her previous one was decertified.