<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">certificates of authenticity</topic></authority><related type="narrower"><topic>certificates of authenticity for relics</topic></related><related type="other"><topic>authenticity</topic></related><related type="broader"><topic>certificates</topic></related><variant type="other"><topic>COA</topic></variant><variant type="other"><topic>authenticity, certificates of</topic></variant><variant type="other"><topic>certificate of authenticity</topic></variant> <note xml:lang="en"><![CDATA[ Certificates attesting that a thing or things are of the location of origin, provenance, creator, date, or materials which are claimed; signatures of officials or official seals are often included on the certificate to verify the claim. Examples include certificates of authenticity for art works, artifacts, memorabilia, collectibles, and software. ]]></note></mads>