Reasonable in the Moment, Binding in the Morning: Managing Forbearance Before It Becomes a Variation

Public bodies rarely set out to rewrite a contract by email. More often, a service is late, a milestone slips, a supplier asks for patience, and an officer agrees that enforcement would be disproportionate in the circumstances. The response is operationally understandable. The legal risk is that repeated forbearance, left unrecorded and unmanaged, begins to look like a settled position. What was intended as a temporary concession can be characterised as a waiver by conduct, an estoppel, or an informal variation. By the time the authority seeks to enforce the original terms, the paper trail may tell a different story.

Forbearance is not the same as surrender

Forbearance is a decision not to enforce a right for the time being. It may be entirely lawful and commercially sensible. A supplier in temporary difficulty may recover faster with a short extension than with termination. A minor defect may be better remedied through a improvement plan than through dispute. The difficulty lies in the difference between a temporary posture and a binding commitment.

A waiver occurs where a party, with knowledge of a breach, clearly and unequivocally indicates that it will not enforce the relevant right. The indication can be by words or conduct. A single email may suffice if it is sufficiently clear. Repeated acceptance of late delivery, payment without deduction in the face of known non-compliance, or a pattern of allowing work to continue outside an agreed scope can all be relied on as evidence that the authority has chosen not to insist on its rights.

Estoppel is a related but distinct risk. If an authority represents that it will not enforce a term, the supplier relies on that representation, and the supplier suffers detriment as a result, a court may prevent the authority from resiling from the representation. The doctrine is not a general licence for suppliers to escape contractual obligations, but it is a real constraint where conduct has created a reasonable expectation.

Neither doctrine requires a formal variation document. That is precisely why informal leniency is dangerous. A variation clause may prescribe how changes are to be agreed, but it does not automatically neutralize waiver or estoppel. A no-oral-modification clause can be valuable, but it is not a complete answer where conduct has created a separate legal expectation.

The authority question

Public bodies face an additional governance dimension. The officer who grants an indulgence may not hold the delegated authority to vary the contract, commit expenditure, or waive a contractual remedy. Internal rules often distinguish between operational decisions and decisions with legal or financial consequences. An informal concession that crosses that line may be unauthorized even if it is well intentioned.

The authority may also be constrained by public law. Discretion must be exercised for proper purposes, on relevant considerations, and within the scheme of delegation. A course of conduct that fetters future discretion, or that commits the authority to a position it has not properly approved, is vulnerable to challenge. The fact that a supplier has relied on the concession makes the position more difficult, not less.

Practical authority matters too. Suppliers may deal with contract managers, interim staff, or technical specialists who appear to speak for the authority. Apparent authority can bind in some circumstances, particularly where the authority has allowed that impression to develop. The safer approach is to ensure that anyone empowered to discuss performance also understands the limits of what they can concede, and that concessions with contractual significance are escalated before they are communicated.

Where procurement rules bite

Contract variation is not only a commercial law issue. In public contracts, a change that alters the scope, value, or risk allocation may engage procurement rules. The current regime permits modifications in defined circumstances, but informal forbearance can obscure whether a permitted ground applies. A series of small concessions may cumulatively amount to a material change. If the authority later seeks to regularize the position, it may find that the contract no longer reflects the bargain that was procured.

This is particularly relevant where leniency affects price, duration, deliverables, or the balance of risk. A short extension for operational reasons may be unobjectionable. An open-ended tolerance of late delivery, combined with continued payment and no recorded end date, is harder to defend. The procurement analysis should be made at the point of decision, not reconstructed after a challenge.

A control framework for forbearance

The first control is to decide. Forbearance should be a conscious decision, not an accumulation of unattended emails. The decision-maker should identify the breach, the right being deferred, the reason for deferral, the period, and the conditions. If the authority intends to preserve its rights, it should say so clearly.

A reservation-of-rights letter is a familiar tool, but its value depends on consistency. Reserving rights in one letter and then acting contrary to that reservation over months may weaken the effect. The reservation should be repeated at appropriate intervals and should be reflected in operational behaviour. Where the authority is willing to accept a variation, that should be documented through the contractual variation procedure, with the necessary approvals.

The second control is delegation. The scheme of delegation should make clear who can approve forbearance, who can waive a remedy, and who can agree a variation. Thresholds should reflect financial and legal risk, not simply contract value. Legal review should be triggered where the concession is open-ended, where the supplier has relied on it, or where the procurement position is uncertain.

The third control is record-keeping. A forbearance register or contract management log can capture concessions, their duration, the reasons, and the review date. The record should distinguish between operational flexibility and contractual entitlement. It should also record what the authority has not agreed. Silence is rarely a reliable form of communication.

The fourth control is review. A concession granted for two weeks should not quietly become a permanent arrangement. A review date creates an opportunity to decide whether to enforce, vary, or terminate. It also prevents drift from becoming the default.

Keeping leniency lawful and reversible

Informal leniency is not inherently improper. Public bodies need room to manage relationships, respond to supplier distress, and avoid disproportionate enforcement. The discipline lies in making the choice explicit, keeping it within authority, and preserving the ability to change course. A short email that reserves rights, states an end date, and records the reason is often enough. A pattern of unrecorded concessions is not.

The test is not whether the authority meant to be kind. It is whether a reasonable observer, looking at the correspondence and conduct, would conclude that the authority had given up its right to insist on the contract. If the answer is unclear, the governance record needs attention before the next concession is granted.