Confirmation of verbal instruction
Construction contracts generally give the contract administrator the power to issue instructions to the contractor.
Broadly, instructions may be given:
- To vary the works
- To postpone the works.
- To remedy workmanship, goods or materials, and equipment which are not in accordance with the contract.
- To sanction a variation made by the contractor.
- In relation to the expenditure of provisional sums.
- To open up work for inspection.
- To carry out tests.
- To exclude persons from the site.
The contractor must comply with the instructions within certain limitations. They have the right to ‘reasonably object’ to an instruction, and instructions can only be given as empowered by the contract.
Generally, instructions must be made formally, in writing, following a procedure set out in the contract. However, it is common for contracts to allow instructions to be given verbally, for example during a meeting, a site visit, or in an emergency situation. In this case, either the contract administrator should then confirm the instruction in writing to the contractor, or the contractor should confirm the instruction in writing to the contract administrator. If the receiving party does not dissent from the written confirmation, then the instruction will take effect.
This confirmation is referred to as a confirmation of verbal instruction (CVI) or an oral confirmation sheet. The contract should set out the exact procedures and the timescales for issuing such an instruction and dissenting from it.
Contracts can be vague about the nature of such confirmations, other than that they should be given in writing. Generally they should include:
- Details of who it is issued by and who it issued to.
- The date.
- Details of the contract that permits the instruction.
- The number of the CVI.
- Details of the instruction.
- The signature of the party issuing the CVI.
It is sensible to send an instruction by recorded delivery, or to confirm its receipt in the minutes of subsequent meetings. On some projects, there may an automated system in place for capturing and managing CVI’s and other instructions.
If a formal procedure is not followed for confirming verbal instruction, there can be disputes about:
- Work that has not been done which the contract administrator believes have been agreed.
- Work that the contractor has done but the client does not wish to pay for.
- Whether the instruction has been given to the right person, by the right person.
- Whether the instruction is allowed under the contract.
- Whether it has been properly valued and the value agreed.
- Whether the consequences on the programme have been properly considered.
- Whether an extension of time should be awarded.
Some contracts may make it a condition precedent to works being carried out that instructions are issued in writing. However, this can put the contractor in a difficult position, and whether to proceed with the works or to wait for a written instruction may be a commercial rather than a legal decision.
It is important that any instruction it is given by the contract administrator, rather than, for example, by the client, otherwise the instruction may constitute a new contract.
[edit] Related articles on Designing Buildings
- Adjudication.
- Alternative dispute resolution.
- Arbitration.
- Architect.
- Architects instruction
- Change control
- Compensation events.
- Contract administrator.
- Contract sum.
- Defects liability period.
- Defects.
- Extension of time.
- Instruction.
- Mediation.
- Oral variation to written contract.
- Provisional sums.
- Relevant event.
- Variations.
- Work instruction.
Featured articles and news
Edmundson Apprentice of the Year award 2026
Entries now open for this Electrical Contractors' Association award.
Traditional blue-grey slate from one of the oldest and largest UK slate quarries down in Cornwall.
There are plenty of sources with the potential to be redeveloped.
Change of use legislation breaths new life into buildings
A run down on Class MA of the General Permitted Development Order.
Solar generation in the historic environment
Success requires understanding each site in detail.
Level 6 Design, Construction and Management BSc
CIOB launches first-ever degree programme to develop the next generation of construction leaders.
Open for business as of April, with its 2026 prospectus and new pipeline of housing schemes.
The operational value of workforce health
Keeping projects moving. Incorporating unplanned absence and the importance of health, in operations.
A carbon case for indigenous slate
UK slate can offer clear embodied carbon advantages.
Costs and insolvencies mount for SMEs, despite growth
Construction sector under insolvency and wage bill pressure in part linked to National Insurance, says report.
The place for vitrified clay pipes in modern infrastructure
Why vitrified clay pipes are reclaiming their role in built projects.
Research by construction PR consultancy LMC published.
Roles and responsibilities of domestic clients
ACA Safety in Construction guide for domestic clients.
Fire door compliance in UK commercial buildings
Architect and manufacturer gives their low down.



















