Practical guide: international mailNews

It fits in an envelope. That doesn’t make it “just a letter”.

A pen, pin badge, toy or free sample inside a letter is still goods. Check the declaration, customs value and any invoice requirements before sending it abroad—free does not automatically mean tax-free.

By Scott GillettPublished 23 Sept 2026Last reviewed 23 Sept 2026

WHEN IT APPLIESGuidance

Who this affects: UK businesses sending pens, badges, toys, samples or other goods inside international letters, large letters or flats. This guide focuses on dispatch from Great Britain.
Seller action: Check before sending affected goods
Check what is inside, use a service that accepts goods, declare them accurately and confirm the required invoice and customs information. Do not assume a free item has no customs value or qualifies for relief.
Effective dates / current position: Practical guidance on existing requirements—not a new rule or a single commencement date. Check the goods, destination and service before sending.
Last reviewed: 23 Sept 2026 — an editorial source check, separate from automatic timing.
Official source: Open the primary source ↗

Updates to this article

23 September 2026
First published as carrier-neutral practical guidance after checking official postal customs, free-of-charge valuation and sample-relief sources. Invoice requirements and possible charges depend on the destination and service; this is not a new customs rule.

Recorded editorial changes. Automatic timing labels do not change the publication or review dates.

A pen. A pin badge. A small toy. A free sample tucked inside a letter or large-letter mailing.

It might fit through a letterbox, but it still contains goods. The envelope’s size does not make those goods documents or remove customs requirements.

“Free” does not automatically mean “no customs value”. What matters is what is inside and how it must be declared—not just the shape of the envelope.

Illustrative still life of a plain envelope and paper beside an unbranded pen, pin badges and a small toy car — Illustrative image. Small goods still need the right customs information and suitable packaging.

What should you check before sending?

When sending these items internationally from Great Britain, check that you:

Use a service that accepts the contents—not a document-only service. Check its packaging, size and weight limits too.
Describe each item clearly. “Free gift” or “sample” alone does not explain what it is.
Declare the quantity, origin and an appropriate customs value, with the correct commodity code where required. Don’t enter zero simply because the recipient hasn’t paid. Follow the destination’s valuation rules.
Supply the required customs declaration and electronic information, plus a commercial or pro forma invoice where the service or destination requires one. A customs declaration and an invoice are not automatically interchangeable.
Check destination restrictions and any conditions for sample relief. A promotional giveaway does not automatically qualify for relief or private-gift treatment.

Could the recipient still face charges?

Depending on the destination and the goods, import duties, taxes and clearance charges may still arise—even when the item was supplied free of charge. Missing or inaccurate information can also cause delays or returns.

For example, Ireland’s sample relief has specific conditions, including negligible value and use to obtain orders for the goods represented. It is not a general exemption for anything marked “sample”. Other destinations have their own rules.

The key question is not just “Does it fit in a letter?”

It’s “What’s inside, and has it been declared correctly?”

Northern Ireland routes can follow different rules. Requirements depend on the goods, destination and service used.

Use the pre-dispatch checklist to prepare the underlying shipment information.

Official sources

HMRC: sending post or a parcel abroad — UK postal export declarations and supporting documents.
Universal Postal Union: Convention Manual — article 20 and regulation 20-001 on postal customs control, declarations and accompanying documents.
Universal Postal Union: electronic advance data — customs and security information for mail containing goods.
HMRC: free-of-charge goods and customs valuation — a UK import example of why no sale does not automatically mean no customs value; the destination’s rules govern an export.
Irish Revenue: relief for samples — conditions for the Ireland example, not a worldwide exemption.
HMRC: duties and import VAT on gifts — a UK import example of private-gift conditions; do not assume a business giveaway receives that treatment abroad.