Legal Definition of Certificate: A written statement serving as verification and authentication of the fact set forth. Such a document is often signed by a notary public | Discover the Legal Definition of Certificates: A Key Guide for Business Owners. Gain insights into the importance and various types of certificates, such as birth, marriage, and professional certifications. Understand their role in establishing credibility, legal compliance, and professional advancement. Ensure you navigate legal requirements and build a strong foundation for your business