What does Chain of Custody mean?

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<blockquote class="wp-embedded-content" data-secret="Sp5y4ldZoF"><a href="https://www.bwf.org.uk/bwf-blog/what-does-chain-of-custody-mean/">What does Chain of Custody mean?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.bwf.org.uk/bwf-blog/what-does-chain-of-custody-mean/embed/#?secret=Sp5y4ldZoF" width="600" height="400" title="&#8220;What does Chain of Custody mean?&#8221; &#8212; British Woodworking Federation" data-secret="Sp5y4ldZoF" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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