1. removes or withdraws official certification, approval, or recognition from something or someone
Usage: third person singular present tense of ‘decertify’

Examples

• The state board decertifies teachers who violate professional standards.
• The agency decertifies products that fail safety inspections.
• The union fears the company decertifies their bargaining rights.
• The medical board decertifies doctors for malpractice.
• The organization decertifies members who break ethical codes.
• The government decertifies schools that don’t meet requirements.