|
When it comes to structured finance, one thing matters almost as much as the assets themselves: making sure they’re safely set aside and can’t be claimed by someone else if the borrower goes under. That’s where the security package comes in – not bouncers at the door kind, but a set of legal tools designed to keep those assets protected and ready to be enforced if things go wrong.
Whether it’s a securitisation, a repackaging programme, or a collateralised lending structure, investors want reassurance that the assets backing the deal won’t disappear into a black hole at the first sign of trouble. Luckily, English law, offers a lovely array of security interests to choose from – each with its own rules, quirks and paperwork rituals.
In this article, we’ll walk through the structured finance favourites: fixed and floating charges, mortgages (legal and otherwise), pledges, liens, and – cue the dramatic music – perfection (yes, we’ll explain what that means too).
In the world of structured finance, you’ll keep bumping into two familiar faces: the fixed charge and the floating charge. They’re the Ant and Dec of security interests – inseparable, often confused, but each with their own distinct role (and yes, one usually takes the lead).
A fixed charge is all about control – the kind of relationship where the lender knows exactly where the asset is, what it’s doing, and who it’s talking to. The charge sticks to specific, identifiable assets like an aeroplane or a building – and says: “Don’t move” – in the ownership sense.
But it’s not enough to just label it “fixed” and hope for the best. The lender has to actually control the asset. If the SPV can waltz off and use the money without so much as a WhatsApp to the lender, then it’s likely not a fixed charge at all. And if a court reclassifies your fixed charge as floating, you’ll lose your place in the insolvency queue. Which brings us to…
Floating charges are the chill, live-and-let-live type. They’re designed for assets that come and go – like cash, stock, or receivables – and let the SPV carry on business as usual. The charge just floats gently above the asset pool, like a legal cloud waiting to rain.
But when the SPV hits a rough patch – default, insolvency, or some other contractual catastrophe – the floating charge crystallises. That means it locks on to whatever assets are left and starts behaving like a fixed charge that’s just turned up late to the party.
Because not all security is created equal. In an insolvency, fixed charges take priority – they get first dibs on the assets. Floating charges come lower down the chain, behind fixed charges and certain preferential creditors (hello HMRC, hello unpaid wages).
So, if your carefully labelled “fixed” charge ends up being reclassified as floating, you might find yourself elbowed to the back of the payout queue – behind people you didn’t even know were invited.
In short: call it what you like, but if the court says it floats, it floats.
Mortgages in structured finance aren’t just for people trying to get on the housing ladder. Here, it’s a way of giving a lender rights over an asset – rights that say, “This is mine, unless and until you pay me back.”
The headline act is the legal mortgage – the full-fat version. It involves transferring legal title of an asset (like land, shares, or bonds) to the lender, who agrees to hand it back once the debt is repaid. It’s neat, it’s strong, and it gets the job done.
But as with many things in finance, there’s paperwork involved. For land, it must be done by deed and registered at HM Land Registry. For companies, there’s an extra stop at Companies House. Shares? You’ll need stock transfer forms, share certificates, and the lender’s name in the company’s register of members. It’s not the world’s most exciting to-do list but ticking all the boxes gets you full legal protection.
Sometimes, a full legal transfer is just too much faff – maybe it’s impractical, maybe it’s too disruptive, maybe the client looked like they needed a lie-down when you mentioned “register of members”. In those cases, we turn to the equitable mortgage.
This version doesn’t transfer legal title. Instead, it gives the lender beneficial ownership of the asset – often backed by a stack of helpful extras like undated transfer forms and powers of attorney. You might not be the official owner, but you’ve got everything you need to become one, fast, if the borrower defaults.
It’s not quite as bulletproof as a legal mortgage – but in the structured finance world, it’s often a perfectly good alternative, especially where speed, flexibility and discretion often have the upper hand.
If mortgages are about paperwork, pledges and liens are about one thing: possession. No forms, no filings – just holding on tight until you’re paid.
Pledges: Give It Here, or Else
A pledge is created when the borrower physically hands over an asset to the lender as security. If the borrower defaults, the lender can sell the asset to recover the debt. It’s simple, fast, and doesn’t require registration.
But there’s a catch: it only works with tangible, movable assets – like bearer bonds, physical share certificates, or title documents. In a world where most assets are digital, true pledges are less common. Still, in structured finance deals involving physical notes or vault-held securities, the pledge remains a solid choice.
Liens: Not Giving it Back Until You Pay
A lien works a bit differently. It doesn’t come from an agreement – it arises automatically by law or custom. If someone’s holding your asset – say, a banker or custodian – and you owe them money, they can keep it until you pay.
Like pledges, possession is everything. If the lienholder gives the asset back, the lien disappears. There’s no register, no transfer of title – just a firm grip and a legal right to hold on.
In structured finance, liens are often expressly preserved in contracts, especially where agents or custodians are safeguarding financial instruments or important documents.
Perfection: Making It Official (and Insolvency-Proof)
So, you’ve taken security over an asset. Lovely stuff. But until you’ve perfected it, that shiny new charge might look good on paper – but without perfection, that’s all it is: paper.
In English law, perfection means making your security interest legally effective against third parties – the people who aren’t in the deal but still very much want a say when something goes wrong.
Here’s how it’s done:
Registration – Do the Paperwork
Certain types of security – particularly charges over company assets and legal mortgages over land – need to be registered with the appropriate registry. No registration means no enforceability. It’s not glamorous, but it matters.
Possession – Keep Hold of It
Some security interests, like pledges and liens, are perfected by simply holding onto the asset. Possession gives you priority. Lose possession, and you lose the protection. Simple as that.
Control – The FCARs Route
If you’re dealing with financial collateral – like cash, shares, or securities – control can be enough. Under the Financial Collateral Arrangements (No. 2) Regulations 2003 (FCARs), there’s no need for registration if the lender can access or realise the collateral without further consent.
It’s fast, efficient, and loved by structured finance lawyers everywhere.
Special Registries – For the Quirky Stuff
Some assets come with their own specialist rules – ships, aircraft, intellectual property, and so on. If it’s unusual, it probably has its own registry. Always check the small print.
Ask yourself:
Can I register it? Can I hold it? Can I control it?
If the answer’s “none of the above,” your security may need a rethink – or a strong cup of tea and a redraft.
Behind every confident structured finance deal is a well-behaved security package quietly doing its job – ideally, one that’s been perfected and properly filed.
Whether it’s a fixed charge locking down key assets or a lien buried in the custodian agreement, these legal tools aren’t just background admin – they’re what makes the whole structure work. They’re also what investors and rating agencies look to when things get bumpy.
So, take them seriously. Draft them carefully. Perfect them properly. Because in this business, it’s not the structure that fails – it’s the bit someone forgot to register.
Stay updated with the latest insights and articles delivered to your inbox weekly.
Stay Informed with Our Updates
Subscribe to our newsletter for the latest insights and expert advice
on funding structures.
