Contract variations and written approval

A contract variation changes an existing agreement. Record the precise change and check the amendment process in the contract. A project team's operational agreement may leave uncertainty about price, timing or whether the required approval has been obtained.

Separate a clarification of existing scope from additional work. If the change affects only one order under a framework agreement, say so. Review dependent provisions, including milestones, service levels and liability calculations, so that the variation does not create conflicting obligations.

Identify exactly what the change affects

Quote the agreement, order and clause or schedule being changed. State whether the variation applies to one project, all future orders or the entire relationship. A sentence approving additional work can leave the parties uncertain about existing milestones, support duties or pricing. Make the changed obligation and its boundaries explicit.

Distinguish a proposed change from one already implemented. If work began before formal documentation, record the true chronology and obtain advice on the position. Do not backdate signatures or claim that approval existed when it did not. A later agreement may address earlier events, but its wording should accurately describe that arrangement.

Connect scope, price and time

Describe the additional or reduced deliverable in the same practical detail as the original specification. Identify acceptance criteria and customer inputs. Ask whether the change affects previously agreed work or only adds a separate item. A new feature may require re-testing existing functions, which should be considered before promising an unchanged completion date.

State the fee, payment trigger and treatment of expenses or credits. Applicable late-payment rules may remain relevant to amounts becoming due under the revised arrangement. ^[2] Finance should know whether a variation produces a new invoice, changes a milestone or adjusts an existing balance. Avoid leaving the accounting treatment to an informal interpretation after the work is delivered.

Check dependent contract provisions

Review service levels, warranties, licences and liability calculations affected by the change. A cap based on the original fee may operate unexpectedly after a substantial scope increase. A licence limited to one use may not cover a newly requested distribution channel. The variation should preserve or amend those provisions consciously rather than leave contradictory commitments in place.

Consider whether third-party consent is required. A lender, customer or licensor may have rights affected by the proposal. Internal agreement between project managers does not bind those third parties. Identify consents as completion conditions where appropriate and keep evidence that they were obtained before relying on the changed arrangement.

Follow the agreed approval and execution route

Read the contract's amendment requirements and obtain advice where the legal effect of an informal change is uncertain. Identify who can approve the commercial change and who may execute the document. Company execution formalities can be relevant, particularly if a deed is used. ^[1] A signature platform cannot resolve missing authority or an unsuitable document form.

If the agreement requires a particular written process, incorporate it into project management. Give staff a simple way to raise a change request and obtain a decision before work starts. The process should be quick enough for ordinary variations while escalating material risk. An unusable procedure is likely to be bypassed, leaving the same uncertainty the clause was meant to avoid.

Keep a consolidated view of the live agreement

Number or date variations and store them with the original contract. Maintain an index showing the current scope, price and completion timetable. Do not silently replace the original signed document with an edited copy that hides the amendment history. A future project manager needs to understand both the current obligations and how they changed.

After agreement, update delivery plans, billing instructions and renewal or notice dates affected by the variation. Tell the people performing the work which version now applies. Read Board approval of commercial contracts for company approval of commercial commitments. Commercial contract review can help review a variation and its dependent provisions so the revised arrangement is clear to both the legal and operational teams.

Close the change request with operational confirmation

After the variation is signed, ask the project and finance owners to confirm that their plans reflect it. A revised contract can remain ineffective in practice if the team continues delivering the old specification or invoices the original milestone amount. Record any transition tasks, including retesting, customer training or changes to third-party orders. If the variation reduces work, identify what happens to material already produced and costs already committed. This prevents the parties from treating the new scope as though it had always existed while leaving earlier authorised work and expenditure without an agreed commercial treatment.

Illustrative scenario

A client asks a developer to add reporting features after the specification is approved. The developer agrees informally but later invoices for additional days. A change record would identify the added deliverable, agreed fee and revised acceptance date before work started, reducing uncertainty for both the project manager and finance team.

Preparation checklist

• Quote the clause or schedule being amended.
• State the effective date and any retrospective effect.
• Show the price, timetable and dependency changes.
• Keep approval evidence with the original agreement.