Customer due diligence, usually called KYC (Know Your Customer), means finding out and verifying who a customer or owner actually is. The requirements come from anti-money-laundering and counter-terrorism-financing legislation.
For banks, advisers and investors it is important to see through ownership structures and identify the beneficial owner of a limited company. A correct, traceable share ledger and an up-to-date shareholder register make KYC work easier, especially in capital raising and due diligence.

A beneficial owner is the natural person who ultimately owns or controls a company.
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A shareholder register is a record of all the shareholders in a company and their holdings.
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A share ledger is a record of a company's shares and who its shareholders are.
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Capital raising is when a company brings in new capital, for example through a new share issue.
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