If you need to prove that you have ever had a health certificate, you can use the following methods:
1. Copy of health certificate: You can copy the health certificate in the institution or department that issued the health certificate, and affix the official seal or signature on the copy.
2. Provide photos and certificates: In many cases, you can provide your photos and certificates on the health certificate to the institutions or departments that need to prove that you have had a health certificate.
If you need to prove that you currently have a health certificate, you can use the following methods:
1. Print health certificate: you can log on to the website of the health certificate issuing agency, download and print the health certificate, and provide printed copies if necessary.
2. Provide electronic certificate: Some institutions or departments may accept electronic health certificate, and you can provide your electronic health certificate to these institutions or departments.
Please note that the above methods may be different in different regions and specific situations. You can consult relevant institutions or departments to obtain more accurate information.