to say in a formal or official way, usually in the form of an official document, that something is true or correct
The photograph on her passport certified that she was indeed Jolene Sawyer.
The document was carefully reviewed by the notary public before they could certify its authenticity.
After completing the training program, she received a certificate to certify her proficiency in the new software.
The organic produce was labeled with a seal to certify that it met the standards for pesticide-free farming.
The auditor was hired to certify the company's financial statements and ensure compliance with accounting standards.