Security in Name Only: Personal Guarantees Through a Corporate Restructuring

A personal guarantee is rarely the centre of attention when a facility is signed. It sits behind the balance sheet, behind the security package and behind the commercial relationship. It becomes important only when the borrower’s circumstances change. That is also the moment at which the guarantee is most likely to be tested — and, in a surprising number of UK disputes, found wanting.

The restructuring context exposes the weakness. A company may extend its facilities, move debt within a group, release a co-guarantor, grant new security or enter administration, a company voluntary arrangement or a Part 26A restructuring plan. Each step can alter the risk that the guarantor originally agreed to carry. Unless the guarantee is drafted and administered with those changes in mind, the guarantor may argue that consent was never given, notice was never received or the liability has been released by operation of law.

The guarantee is tested when the borrower changes shape

A guarantee is not a static attachment to the original loan. It is a contract about risk. The guarantor agrees to answer for another party’s obligation on particular terms. If the creditor later changes those terms materially without the guarantor’s consent, the guarantor may be discharged. The principle associated with Holme v Brunskill remains central: a material variation to the underlying arrangement, made without the surety’s consent, can release the surety.

Modern guarantee documents usually attempt to displace that result through a variation clause. But a clause is only as good as its scope and its operation. A generic consent to ‘any variation’ may be construed narrowly. A clause buried in a schedule may not be brought to the guarantor’s attention. A variation clause that purports to cover every conceivable change may still fail where the change is so fundamental that it falls outside the bargain the guarantor accepted.

For lenders and suppliers, the practical question is not whether the guarantee contains a variation clause, but whether the clause identifies the kinds of change that actually occur in a restructuring: increased commitments, extended maturity, changes in interest and fees, additional borrowers, release of security, subordination and group reorganisation.

Continuing or confined: the first drafting question

A guarantee may be continuing or limited to a specific transaction. The distinction matters. A continuing guarantee can cover future advances and the ultimate balance owing, subject to any cap or termination right. A confined guarantee covers only the indebtedness identified at the outset. If the parties later add a new facility or replace an existing one, a confined guarantee may not follow the debt.

Drafters should therefore state expressly whether the guarantee is continuing, whether it covers all present and future obligations, and whether it survives intermediate repayment. A guarantee that is silent on continuation may be read against the creditor, particularly where the new lending is structurally different from the original facility.

The instrument should also clarify whether the guarantor is a surety or a principal debtor. A guarantee and indemnity combination is common, but the two limbs do different work. If the guarantee limb is discharged by a variation, the indemnity limb may still survive — provided the drafting is clear and the indemnity is not merely parasitic on the guarantee.

Release mechanics: who is let go, and on what terms

Restructurings frequently involve releasing a borrower, a co-guarantor or security. Each release is a potential exit route for the guarantor. The release of a co-guarantor can reduce the contribution the remaining guarantor might have recovered. The release of security can impair the creditor’s position. The release of the borrower may, depending on the terms, undermine the guarantee altogether.

A well-drafted guarantee includes a reservation of rights. It should confirm that releasing one guarantor, granting time to another or varying security does not release the remaining guarantors. It should also address the creditor’s ability to deal with security without consent. But reservation language must be exercised consistently. Internal credit approvals, side letters and restructuring documents can inadvertently contradict the guarantee. If the creditor tells a guarantor that it will be released, or behaves as though it has been, the written reservation may not save the position.

Notice, demand and limitation

Notice provisions are often treated as administrative. In a guarantee dispute they can decide the claim. The guarantee should specify how a demand is made, to whom, at what address and when it is deemed received. It should also address notices of variation, termination and enforcement. Where the guarantor is an individual, practical notice to a home address may matter more than a portal upload.

Limitation requires separate attention. A simple contract guarantee is generally subject to a six-year limitation period, while an instrument under seal may attract twelve years. But the accrual date is not always straightforward. It depends on whether the instrument is a true guarantee, an indemnity or an on-demand guarantee, and on when the liability accrued or demand was made. A continuing guarantee does not necessarily restart the clock for old indebtedness merely because a new advance is made. Creditors should diarise limitation by reference to the actual instrument, not by assumption.

Insolvency is not automatically a release

A company’s insolvency process does not, of itself, release a personal guarantor. The guarantee may continue to stand behind the debt even where the borrower’s liability is compromised or restructured. But the point should not be left to inference. The guarantee should expressly confirm that it survives any compromise, scheme, restructuring plan, moratorium or release of the borrower, subject to mandatory insolvency law and any order of the court.

That language is particularly important where a restructuring plan or scheme purports to release claims against the company. The guarantor may argue that the release of the principal debtor also released the guarantee. An express survival clause, coupled with a principal debtor clause and a clear reservation of rights, reduces that risk.

A practical checklist for 2026

• Confirm whether the guarantee is continuing, capped and capable of covering future advances.
• Check that the variation clause expressly covers restructurings, additional borrowers, extended maturity and changes to security.
• Ensure the guarantee and indemnity limbs are separately drafted and not mutually dependent.
• Include reservation-of-rights language for releases, time variations and impaired security.
• Require written consent from the guarantor for material variations, or record that consent in the restructuring documents.
• Review notice and demand mechanics against the guarantor’s actual address and status.
• Diarise limitation by reference to the instrument and the accrual event.
• Include express survival language for insolvency compromises and restructuring plans.
• Keep side letters, credit approvals and restructuring communications consistent with the guarantee.

Personal guarantees are not defeated by a single clause. They are defeated by the gap between what the creditor assumed and what the instrument actually says. In a restructuring, that gap is where the security quietly disappears.