Approved verification: guidance, application form and stickers

Weights and Measures Act 1985 and subsequent Deregulation Order 1999 (as amended).

Approved verifiers

Section 11A of the Weights and Measures Act, introduced by the Deregulation (Weights and Measures) Order 1999, enables manufacturers, installers and repairers of weighing and measuring equipment to pass as fit for use for trade or re-qualify certain equipment. The Legislative Reform (Verification of Weighing and Measuring Equipment) Order 2008 further amended the Weights and Measures Act 1985 to permit existing approved verifiers to conduct verification after the activity of adjustment.

Manufacturers, installers and repairers of weighing and measuring equipment can apply to the Secretary of State for approval under section 11A of the Act.

The approval system contains a requirement that the approved verifier possesses and operates an acceptable certified quality system. This must fully encompass the requirements of the legislation and the activities to ensure that equipment is correctly verified and necessary consumer protection is maintained.

Once granted approval, the approved verifier is subjected to regular audits, is limited to specific equipment types and can have approval suspended or withdrawn if found to be in breach of their approval conditions.

Guidance on gaining and maintaining approved verification status

Apply to become an approved verifier

Manufacturers, installers and repairers of weighing and measuring equipment seeking an approval to conduct verification (passing as fit for use for trade or re-qualification) need to submit a completed application form for approved verifier status with their supporting documentation.

Download the application form for approved verifier status (ODT, 29.7KB)

Identify an approved verifier

The Office for Product Safety and Standards (OPSS) maintains an up to date register of all approved verifiers and an up to date list of authorised stamp numbers.

Approved verifiers register January 2021 (ODS, 25.6KB)

Authorised stamp numbers

Verification stickers correspondence and pricing

Occasionally, OPSS receives queries regarding verification stickers. The most common questions are:

How do I place an order for stickers?

Orders require the metrology stickers order form below to be completed and sent to OPSS. We cannot process orders without this form. A purchase order is also required and must contain a purchase order number, details of the order required, invoice address and delivery address.

Download the metrology stickers order form (ODT, 63.5KB)

Please send the form and purchase order to

What are the prices for the stickers?

Approved bodies, approved verifiers and inspectors can claim an initial free sample of 20 stickers, but subsequent stickers have to be purchased. This is for both initial verification and requalification with the exception of requalification stickers for inspectors, which are available free of charge.

With regard to the purchasing of the new metrology stickers, the prices and quantities are as follows:

  • 500 Stickers=£30+VAT
  • 1000 Stickers=£50+VAT
  • 2000 Stickers = £100+VAT

Smaller amounts can be supplied but where less than 250 are required there is a minimum charge of £10+VAT.

Delivery is free of charge and posted second class. Please raise a purchase order stating quantity required and which sticker type along with the approved body or inspector number.

How long does it take to produce the stickers?

OPSS aims to have stickers produced and put in the post in 5 to 10 working days from receipt of your order.

How long will it take for them to be delivered?

Stickers are sent using royal mail second class postage. Orders that come to more than £250+VAT are sent using royal mail second class recorded delivery.

Reporting issues with approved verifiers

Approved verifiers must comply with the conditions of their approvals. Any concerns discovered by inspectors or verifiers of equipment should be notified to OPSS for investigation.

Please supply enough information, including a brief description of the events, the approved verifier concerned, the point in issue and actions taken to date.

Issues should be reported by email:

Example notification formats for use by fuel dispenser approved verifiers

These are for download, editing and use by approved verifiers:

Notification template 01 (ODT, 21.2KB)

Notification template 02 (ODT, 16.7KB)

Published 20 March 2014
Last updated 3 March 2021 + show all updates
  1. Application form for approved verifier status revised.

  2. List of approved verifiers updated.

  3. List of identification stamp numbers updated.

  4. Metrology stickers order form added.

  5. List of approved verifiers and identification stamp numbers issued to Local Weights and Measures Authorities updated.

  6. Approved verifier register and master stamp list have been updated. This is a listing of the numbers allocated to local weights and measures authorities and approved verifiers for identification purposes on items of weighing or measuring equipment.

  7. The list of approved verifiers has been updated. This register lists those manufacturers, installers and repairers (M/I/R) who have been granted approved verifier status under the provisions of section 11A of the Weights and Measures Act.

  8. The attachment for the list of approved verifiers has been updated.

  9. Updates to the approved verifier register and approved stamp number list.

  10. Metrology stickers email address has changed.

  11. Approved verifiers register has been updated.

  12. Approved verifiers register updated

  13. Approved verifiers register has been updated.

  14. The approved verifier register has been updated.

  15. Attachment for the the approved verfiers list has been updated.

  16. The approved verifier register attachment has been updated.

  17. First published.