Hallmarking Services
Protect your business and customers with official UK hallmarking services. Legal compliance, quality assurance, and customer confidence – all backed by 250+ years of heritage.
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Express Services Available
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Secure Collection & Delivery
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Laser & Punch Application
What is Hallmarking?
Hallmarking has been part of UK history since the 1300s and remains one of the oldest ways to protect consumers buying precious metals. Silver, palladium, gold, and platinum are often mixed with other metals to make them stronger and more durable. Because of this, it’s almost impossible to know how pure a metal is just by looking at it, which is where hallmarking helps.
We test your item using an X-ray Fluorescence (XRF) machine, which accurately measures its elemental makeup. Once tested, it’s hallmarked to show what precious metal it’s made from and its purity. The hallmark also includes your sponsor’s mark, showing that you submitted it for testing, and our assay mark, the anchor, which guarantees it has been tested and verified by us.
What is Hallmarking?
Hallmarking has been part of UK history since the 1300s and remains one of the oldest ways to protect consumers buying precious metals. Silver, palladium, gold, and platinum are often mixed with other metals to make them stronger and more durable. Because of this, it’s almost impossible to know how pure a metal is just by looking at it, which is where hallmarking helps.
We test your item using an X-ray Fluorescence (XRF) machine, which accurately measures its elemental makeup. Once tested, it’s hallmarked to show what precious metal it’s made from and its purity. The hallmark also includes your sponsor’s mark, showing that you submitted it for testing, and our assay mark, the anchor, which guarantees it has been tested and verified by us.
legislation & Compulsory Hallmarks
In the UK, it’s a legal requirement to hallmark precious metal items if they’re being described as Silver, palladium, gold, or platinum. However, hallmarking is only needed if the item exceeds certain weights.
- Silver: 7.78g and over
- Palladium: 1g and over
- Gold: 1g and over
- Platinum: 0.5g and over
Hallmarks must be applied by an official Assay Office—manufacturers and importers can’t add them themselves. Items must be sent to one of the four UK Assay Offices or one recognized under the International Convention.
There are three compulsory hallmarks in the UK:
- Sponsor’s Mark
- Metal & Fineness Mark
- Assay Office Mark
These marks guarantee the quality and authenticity of your piece.
UK Legislation & Hallmark Types
In the UK, it’s a legal requirement to hallmark precious metal items if they’re being described as silver, palladium, gold, or platinum. However, hallmarking is only needed if the item exceeds certain weights.
- Silver: 7.78g and over
- Palladium: 1g and over
- Gold: 1g and over
- Platinum: 0.5g and over
Hallmarks must be applied by an official Assay Office—manufacturers and importers can’t add them themselves. Items must be sent to one of the four UK Assay Offices or one recognized under the International Convention.
There are three compulsory marks that comprise a hallmark in the UK: the Sponsor’s Mark, the Fineness Mark and the Assay Office Mark.
There are also optional marks that can be added to a hallmark. We offer three hallmark types at Birmingham Assay Office. When choosing your hallmark type, you should consider which best suits your product, target market and design requirements.
Explore what each mark means and the options available below.
Dealer's Notice
By law, you are required to display a Dealer’s Notice if you are selling precious metals. This applies whether you sell online or in a store. You must display the notice in a prominent place where it is legible to your customers or somewhere that it is readily visible online.
You can download the Dealer’s Notice and the online Dealer’s Notice free of charge below.
If you would like to purchase a glossy tent-card version of the Dealer’s Notice to display on a countertop in your store, we have copies available for £15+VAT. Please get in touch to purchase.
Standard Hallmark
The three compulsory marks required for qualifying precious-metal articles sold in the UK.
- Includes the Sponsor's Mark?Technical DefinitionThe registered mark of the company or person who submitted the item (e.g. maker or importer), establishing legal traceability., Fineness Mark?Technical DefinitionIndicates the precious metal content of the article, expressed in parts per thousand (e.g., 925 for sterling silver, 750 for 18-carat gold). and Birmingham Assay Office Mark?Technical DefinitionRepresented by an Anchor, this mark guarantees that the item was tested and verified by our historic office, established in 1773.
- Provides independent verification?Technical DefinitionA third-party quality check by an independent assay office, protecting consumers against metal fraud and ensuring standards. of precious-metal fineness?Technical DefinitionThe official millesimal purity stamp showing precious metal content in parts per thousand (e.g., 925 for sterling silver, 750 for 18ct gold).
- Suitable for articles intended primarily for the UK market?Technical DefinitionThe UK hallmarking system is one of the world's oldest and most rigorous, legally protecting buyers of precious metal jewelry since 1300.
- Typical standard turnaround: 3–5 working days
Convention Hallmark
Most Popular
Designed for articles intended for sale across countries participating in the International Hallmarking Convention.
- Includes the internationally recognised Common Control Mark?Technical DefinitionAn internationally recognized balance-scale symbol that allows the article to be imported into other Convention countries without further re-assaying.
- Recognised across Convention member countries?Technical DefinitionParticipating states of the International Hallmarking Convention (e.g. Austria, Finland, Sweden, UK) that accept standard markings across borders.
- Supports international trade and cross-border acceptance
- May reduce the need for duplicate testing and marking?Technical DefinitionWithout a Common Control Mark, imported precious metals are often subjected to costly re-testing and additional stamping by local customs.
Traditional Hallmark
The complete five-mark hallmark, combining the three compulsory marks with two traditional optional marks.
- Includes all three compulsory hallmark?Technical DefinitionUnder the UK Hallmarking Act 1973, any commercial article of gold, silver, platinum, or palladium must bear these mandatory verification stamps. components
- Adds the traditional fineness symbol?Technical DefinitionOptional pictorial stamps (such as the Crown for gold or Lion Passant for sterling silver) certifying high-quality heritage. and date letter?Technical DefinitionAn optional year stamp indicating when the hallmark was applied, tracing back to a 1300s system of changing letters and shield shapes yearly.
- Provides a distinctive, historically inspired hallmark
- Ideal for commemorative, bespoke and heritage pieces
The hallmarking process
Before we can apply a hallmark to your item, we carry out an assessment to ensure your piece meets the legal standards for precious metal composition. We use X-ray fluorescence technology, a non-invasive method of accurately defining the precious metal content.
Unless you provide specific instructions, we’ll choose the best method to apply the hallmark based on the item’s shape, construction, the quantity to be marked, and the hallmark size. We have a range of techniques available, from hand-operated or hydraulic presses for larger or more complex items to cutting-edge laser marking, which is ideal for intricate, delicate pieces.
At Birmingham Assay Office, we’ve made significant investments in the latest laser technology to ensure precision and accuracy. You can choose from two styles of laser mark: an outline or incuse mark, or a relief mark that closely resembles a traditional struck mark.
The Hallmarking Process
Before we can apply a hallmark to your item, we carry out an assessment to ensure your piece meets the legal standards for precious metal composition. We use X-ray fluorescence technology, a non-invasive method of accurately defining the precious metal content.
We have a range of hallmarking techniques available, from hand-operated or hydraulic presses for larger or more complex items to cutting-edge laser marking, which is ideal for intricate, delicate pieces. You can choose from two styles of laser mark: an outline or incuse mark, or a relief mark that closely resembles a traditional struck mark.
Hallmarking isn’t a one-size-fits-all process; the method should be chosen to suit both the piece and its intended purpose.
PUNCH – The traditional manual strike. Best for robust items.
The classic approach where metal punches are manually or mechanically struck into the item. This displaces metal to form a physical indented mark. It requires structured backing support and is best suited for uniform, flat, or thick-walled items.
PunchProduction
LASER – Precise surface marking using fiber-optic technology.
A highly advanced laser process that burns surface atoms, suitable for delicate jewellery. There is no physical stress on the item, making it perfect for hollow or stone-set pieces.
Laser Markingand Personalisation
RELIEF – A high-definition laser process that leaves a raised outer profile.
A form of laser marking that burns away metal surrounding hallmark characters rather than the characters themselves. This creates a raised 3D profile matching traditional struck punches without mechanical pressure—ideal for finished articles and high-end wedding bands.
Laser Markingand Personalisation
The hallmarking process
Before we can apply a hallmark to your item, we carry out an assessment to ensure your piece meets the legal standards for precious metal composition. We use X-ray fluorescence technology, a non-invasive method of accurately defining the precious metal content.
Unless you provide specific instructions, we’ll choose the best method to apply the hallmark based on the item’s shape, construction, the quantity to be marked, and the hallmark size. We have a range of techniques available, from hand-operated or hydraulic presses for larger or more complex items to cutting-edge laser marking, which is ideal for intricate, delicate pieces.
At Birmingham Assay Office, we’ve made significant investments in the latest laser technology to ensure precision and accuracy. You can choose from two styles of laser mark: an outline or incuse mark, or a relief mark that closely resembles a traditional struck mark.
How to Register for Hallmarking
To begin hallmarking with Birmingham Assay Office, you will need to register with us. To register, please fill out this online form
Registration Fee: £80 + VAT
- This covers your Sponsor’s Mark registration with Birmingham Assay Office and is valid for 10 years.
- Need to renew? That’s just £40+VAT
Please note: Each UK Assay Office is independent — this registration only applies to Birmingham.
Punch or Laser Setup
You will need to choose a punch or laser file for marking.
- Punch: £110+VAT
- Laser File: £110+VAT
Already have a punch with us at Birmingham Assay Office? You can get a laser file set up for just £55+VAT.
Not sure which to choose?
Punch marking is traditional. Laser marking is ideal for delicate or detailed items.
Our Customer Service team is available if you have any questions:
Email: customerservice@theassayoffice.co.uk
Telephone: 0121 820 0773
Monday—Thursday: 8:30am-4:00pm
Friday: 8:30am-3:30pm
How to Register for Hallmarking
To begin hallmarking with Birmingham Assay Office, you will need to register with us.
- Registration Fee: £80 + VAT
- Renewal Fee: £40+VAT
This covers your Sponsor’s Mark registration with Birmingham Assay Office and is valid for 10 years. (Please note: Each UK Assay Office is independent — this registration only applies to Birmingham.)
Punch or Laser Setup
You will need to choose a punch or laser file for marking.
- Punch: £110+VAT
- Laser File: £110+VAT
Already have a punch with us at Birmingham Assay Office? You can get a laser file set up for just £55+VAT.
Please contact our Customer Service team if you have any questions.
How to Submit an Item
Once you have registered, or if you are an existing customer, to submit an item, please download the Assay Note.
Complete and include this with your item.
Items can be sent by post or courier, or dropped off at our customer service counter.
Our Address
Birmingham Assay Office, 1 Moreton Street, Birmingham, B1 3AX.
Please ensure you have read and agree to the Terms and Conditions before sending your items.
How to Submit an Item
Once you have registered, or if you are an existing customer, please fill out the submission form when sending items in.
You will receive your submission form via email once completed. Please print and include in your parcel.
Items can be sent by post or courier, or dropped off at our customer service counter.
Our Address: Birmingham Assay Office, 1 Moreton Street, Birmingham, B1 3AX.
Please ensure you have read and agree to the Terms and Conditions before sending your items.
FAQs
How Long Does My Registration Last?
Your registration with Birmingham Assay Office is valid for 10 years.
What Are the Lead Times for Express Hallmarking?
Need it fast? We offer express services:
- 1 Hour Service – Up to 5 items: £60
- Same Day – Drop off by 9:30am, ready by 3:30pm: +100% surcharge
- Next Day – Drop off by 9:30am, ready by 9:30am next day: +50% surcharge
Please note: Express services are subject to availability
Is There a Minimum Parcel Charge?
Yes – a minimum charge applies for each metal, standard, and marking method.
Contact us for details specific to your order.
Are There Any Extra Charges I Should Know About?
Additional charges may apply for:
- VAT
- Handling
- Bagging
- Laser marking
We’ll always be clear about costs upfront.
What If My Item Is Rejected?
Even if your item is rejected, charges still apply. This covers the admin involved in processing the rejection report.
Do I Need to Display a Dealer’s Notice?
Yes – by law, you must display a Dealer’s Notice in-store and online. Failure to do so could result in a £5,000 fine.
What Are Additional Hallmarks?
Along with the standard hallmarks, we offer optional extras such as:
- Traditional Fineness Symbols
- The Date Letter
- The Common Control Mark
- Convention Marks (CCM)
As part of the UK’s membership in the International Convention on Hallmarks, our Convention Hallmark is recognised worldwide, making international trade easier.
These marks clearly show the metal type and fineness, giving you peace of mind that your items are expertly handled at the Birmingham Assay Office.
Commemorative hallmarks are offered to celebrate national events or milestones, including royal jubilees or coronations. These marks are not required by law and are only available for a limited time around the event.
Past examples include:
- The Platinum Jubilee mark for Queen Elizabeth II (2022)
- The Millennium mark (2000)
FAQs
Do I Need to Display a Dealer’s Notice?
By law, you are required to display a Dealer’s Notice if you are selling precious metals. This applies whether you sell online or in a store. You must display the notice in a prominent place where it is legible to your customers or somewhere that it is readily visible online. Failure to do so could result in a £5,000 fine.
You can download the Dealer’s Notice and the online Dealer’s Notice free of charge below.
If you would like to purchase a glossy tent-card version of the Dealer’s Notice to display on a countertop in your store, we have copies available for £15+VAT. Please get in touch to purchase.
How Long Does My Registration Last?
Your registration with Birmingham Assay Office is valid for 10 years.
What Are the Lead Times for Express Hallmarking?
Need it fast? We offer express services:
- 1 Hour Service – Up to 5 items: £60
- Same Day – Drop off by 9:30am, ready by 3:30pm: +100% surcharge
- Next Day – Drop off by 9:30am, ready by 9:30am next day: +50% surcharge
Please note: Express services are subject to availability
Is There a Minimum Parcel Charge?
Yes – a minimum charge applies for each metal, standard, and marking method.
Contact us for details specific to your order.
Are There Any Extra Charges I Should Know About?
Additional charges may apply for:
- VAT
- Handling
- Bagging
- Laser marking
We’ll always be clear about costs upfront.
What If My Item Is Rejected?
Even if your item is rejected, charges still apply. This covers the admin involved in processing the rejection report.
What Are Additional Hallmarks?
Along with the standard hallmarks, we offer optional extras such as:
- Traditional Fineness Symbols
- The Date Letter
- The Common Control Mark
- Convention Marks (CCM)
As part of the UK’s membership in the International Convention on Hallmarks, our Convention Hallmark is recognised worldwide, making international trade easier.
These marks clearly show the metal type and fineness, giving you peace of mind that your items are expertly handled at the Birmingham Assay Office.
Commemorative hallmarks are offered to celebrate national events or milestones, including royal jubilees or coronations. These marks are not required by law and are only available for a limited time around the event.
Past examples include:
- The Platinum Jubilee mark for Queen Elizabeth II (2022)
- The Millennium mark (2000)
The Birmingham Assay Office team provide excellent customer service and are a joy to partner.
They are efficient, helpful, and always friendly. Their customer-first approach has in turn enabled us to reliably help our customers sell. A great organisation you can rely on!
