ICC-SRCC posts all valid certifications and supplements on its web directory at www.solar-rating.org. You can also go directly to the OG-300 directory. Once there, look up the OG-300 certification number from the supplement. Once you find the certificate, click on the link to view the document. If the Puerto Rico Supplement is valid for that system, the supplement will appear at the end of the document. If the OG-300 certification number does not appear in the directory or the supplement does not appear on the certificate, the hardcopy certificate is not valid. Contact ICC-SRCC for more information at firstname.lastname@example.org or on the Contact Us page on our website.