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GLOSSARYTERMS AS A CREDIT DESK USES THEM

Perfection (security interest)

What does it mean to perfect a security interest, and what if a lender does not?

ONE OF 366 TERMS · FREE · NO SIGNUP

BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED

// THE SHORT ANSWER

Perfection is the step that protects a security interest against competing claims, such as other secured creditors and, in some markets, a liquidator. Under the personal property securities laws of New Zealand and Australia it usually means registration on the PPSR, or in some cases possession of the asset or, in Australia, control. In the UK the closest equivalent is registering a company's charge at Companies House within 21 days, without which it is void against a liquidator or administrator. An unperfected interest generally loses priority to perfected ones, and in Australia it vests in the company on liquidation or administration, leaving the lender unsecured.

BASIS  Practitioner judgment from sixteen years in commercial banking, set out in How Bankers Think (Highbank Press, 2026). Every borrower on this site is a composite constructed for teaching, not a client. The market is mid-market commercial lending as practised in New Zealand and Australia; where a convention differs elsewhere, the page says so.

// WHAT IT IS NOT

The PPSR is the register itself; perfection is the legal result a lender is after, and registration on the PPSR is only the most common way of getting it.

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