The Signature That Outlasts the Sale: Retiring Bank Authority After a Subsidiary Exit

Completion is often treated as the moment a subsidiary leaves the group. In banking terms, it is rarely that tidy. Share registers change, consideration moves and announcements are issued, but the account mandate, the online banking token, the direct debit and the parent guarantee may all continue exactly as before. For the seller, that can mean a former subsidiary still operates with authorities granted by the parent, or a parent name still sits behind a facility that the group no longer controls. The governance question is not simply whether these arrangements can be closed. It is whether the board can evidence that they have been closed, by whom, and by when.

Why bank arrangements outlive the deal

Banking authority is contractual and documentary. It does not automatically follow the share transfer. A mandate is an instruction to the bank, accepted on its own terms and subject to its own procedures. Signatories may be named individuals rather than roles, and removing them usually requires a fresh board resolution, updated know-your-customer material and the bank's prescribed forms. Parent-linked facilities add another layer: a guarantee, security interest, set-off arrangement or group cash-pooling agreement may need formal release rather than a letter of notice.

The result is a familiar post-deal gap. The seller has announced the disposal, the buyer has taken control, and yet the old mandate remains on the bank's records because no one has completed the paperwork. In the intervening period, the seller may retain reputational exposure, contingent liability or simply an administrative burden that sits outside the new ownership structure.

Start with an inventory, not an assumption

A pre-completion banking review should begin with evidence rather than memory. Treasury, company secretarial and finance teams should assemble a complete schedule of every bank relationship connected to the entity being sold. That schedule should cover current and dormant accounts, overdrafts, loans, trade finance, foreign exchange lines, corporate cards, merchant acquiring arrangements, payment service providers and any group cash-pooling participation.

For each item, the review should record the account holder, the mandate date, the authorised signatories, the limit or facility, any parent guarantee or cross-guarantee, and the contractual release mechanism. Direct debits and standing orders deserve separate attention because they can continue to draw funds or create obligations long after the strategic relationship has ended. Online banking users, tokens, smart cards and administrator profiles should be listed with the same discipline as paper mandates.

The inventory should also identify which arrangements are held by the subsidiary in its own name and which are held by the parent or another group company for the subsidiary's benefit. That distinction determines who must instruct the bank, who must sign the release and which board needs to minute the decision.

The pre-completion disciplines

Before exchange or signing, the seller should test whether the sale agreement addresses banking separation explicitly. Warranties and disclosure schedules may cover accounts, but they rarely capture the operational detail of mandate retirement. The board should ask for a clear allocation of responsibility: who will submit the mandate changes, who will obtain bank acknowledgements, and what happens if a bank's processing timetable runs beyond completion.

Where a parent guarantee or facility supports the subsidiary, the seller should seek written confirmation of the release conditions before completion. A statement that the guarantee will be released on completion is not the same as a release. The bank may require repayment of the facility, replacement security from the buyer, or a standstill period. If the release is conditional, the board should understand the residual exposure and record it in the completion papers.

Company secretarial teams should also prepare the resolutions and officer certificates that the banks will require. Signatory changes often need certified board minutes, updated specimen signatures and identity documents. These are not administrative afterthoughts; they are the evidence trail that allows the seller to demonstrate control.

Completion-day and post-sale actions

On completion, the seller should not assume that the buyer's new mandate has taken effect. The practical sequence is usually: confirm the subsidiary board's new authority, submit the bank's forms, obtain written acknowledgement that the old signatories have been removed, and verify that online access has been reset. Each step should be logged with a date and an owner.

Direct debits, standing orders and merchant arrangements should be reviewed against the buyer's instructions. Where an arrangement is to continue, the seller should confirm that the paying entity and authority are correct. Where it is to end, cancellation should be evidenced. Corporate cards should be collected or cancelled, and any card limits or guarantees should be formally withdrawn.

For parent-linked facilities, the seller should obtain a release letter or a written confirmation that the guarantee, security or set-off has been discharged. If release is delayed, the board should receive a short exception report setting out the remaining exposure, the expected date and the person responsible for chasing it. A post-completion checklist without evidence is simply a list of intentions.

Who owns the residual risk?

The sale agreement may allocate responsibility between buyer and seller, but it cannot allocate away a bank's contractual rights. If the seller remains a guarantor or a mandate signatory, the seller retains exposure regardless of what the sale agreement says. That is why the board should treat residual banking arrangements as a governance matter rather than a treasury housekeeping item.

The company secretary should maintain a register of mandates and releases, with clear ownership for each open item. Treasury should report progress against the checklist to the audit or risk committee until every material arrangement is closed. The buyer should be asked to confirm when its own mandates are operative, particularly where the subsidiary depends on payment services, payroll or trade finance. A short transition services agreement may be appropriate where continuity is genuinely needed, but it should be time-limited and documented.

A clean exit is an evidenced exit

A subsidiary sale should end with more than a completion announcement. It should end with a file that shows which authorities existed, which were retired, which were transferred and which remain outstanding. For UK groups, that file is the difference between a clean separation and a lingering signature that no one intended to leave behind. The board's test is simple: can it demonstrate, on the balance of evidence, that the group no longer controls or supports the entity it has sold? If the answer is uncertain, the banking clean-up is not finished.