1.   Furthermore, sports collectibles require certificates of authenticity in California.

2.   This requires a certificate of exemption signed by a registered medical practitioner, to avoid conviction for not wearing a seat belt otherwise made compulsory by the regulations.

3.   That defeats the whole purpose of requiring a certificate, since it destroys the certainty which the parties required by providing for the certificate.

4.   But, the WHO says, many countries require this certificate when the vaccination is not really needed.

5.   Death certificates are also required by insurance companies, Social Security Administration and probate courts.

6.   Kenya requires vaccination certificates from travelers who have recently visited yellow-fever areas in a list of countries that includes Cameroon, Gabon, Gambia and Zaire.

7.   The major museums now require certificates that an artifact was obtained legally.

8.   The yellow fever vaccine is the only one for which the World Health Organization still condones requiring a certificate.

9.   Would require certificates of authenticity for autographed sports collectibles.

10.   Diamond exports require a certificate from the state diamond company Endiama or from the Trade Ministry.