Shipping to Guernsey via a UK address: costs and VAT

A customer enters a Portsmouth delivery address, orders from your UK webshop and later asks for the VAT back because the goods arrived in Guernsey. The order has changed from a simple UK address record into an export-evidence question. Your shop needs to distinguish the customer’s residence, the first delivery location, the actual onward movement and the tax treatment you can support.

This guide is for sellers handling consumer orders forwarded through Guernsey Post’s myUKaddress service. It compares that arrangement with direct island delivery and explains which costs remain outside your first label. Official service guidance, terms and HMRC rules were opened on 13 October 2026. It does not quote an AirPost Guernsey label or assume every webshop must offer the same VAT-refund policy.

What is your shop actually delivering to the UK hub? #

Guernsey Post’s FAQ explains that a customer registers for a unique reference and UK address, uses that address at a retailer checkout and pays the onward shipping after the parcel reaches the hub. The customer also provides item information for that onward movement. For your shop, the first shipment is therefore not the whole Guernsey journey.

Preserve the address supplied by the customer, including the forwarding reference, alongside their order details. Do not strip a reference because it looks like an internal stock code. The reference connects the incoming parcel with the correct forwarding account. Before dispatch, ask the customer to resolve an incomplete address rather than guessing which hub entry or account belongs to them.

Keep the commercial sale separate from the forwarding account. The service terms say myUKaddress is for personal use only and must not be used for business purposes. Your customer may use it for an eligible personal purchase from your shop; your shop should not use a consumer account as an undeclared business warehouse or stock-replenishment channel.

Is the UK label the full cost of shipping to Guernsey? #

No. The label to the UK hub covers the first leg. The customer’s forwarding charge covers another stage under Guernsey Post’s service terms. Its final fee depends on the parcel when it arrives, including its size, weight and destination. A free UK delivery promotion on your site does not mean the buyer’s onward delivery to the island is free.

Give your order confirmation a clear delivery endpoint. If you accept the customer’s forwarding address, state that your displayed shipping charge covers delivery there. Ask the customer to check the forwarding service’s own charges and restrictions. This lets them compare your offer with a direct island quote using the same end destination, rather than comparing a complete route with half a journey.

Compare more than the advertised label amount. Determine how loss or damage is handled across the handover and what records each operator supplies. A domestic carrier delivered status can be evidence of arrival at the hub while the customer still waits for onward transport. Preserve that status without rewriting it as final delivery to their Guernsey home.

Can you remove VAT just because the customer lives in Guernsey? #

The customer’s residence is relevant, but it does not replace the export conditions. HMRC VAT Notice 703 distinguishes supplier-controlled direct exports from indirect exports arranged by an overseas customer or their agent. For an eligible indirect export, you need the goods to be physically exported and must retain acceptable evidence within the applicable period.

The notice’s ordinary direct and indirect export limits are three months for export and three months for obtaining evidence. It also sets conditions concerning the customer and use of the goods before export. Review those conditions for the actual sale rather than treating every forwarding-address order as automatically zero-rated. A delivery receipt showing Portsmouth identifies a UK event, not the onward export.

Have your shop decide its process before a refund request arrives. Record whether you charge VAT initially, which evidence you will review and who approves a supported adjustment. Tell the buyer your policy accurately. Your tax accounting decision and the forwarding company’s ability to provide a certificate are related, but neither means the buyer can demand a refund from any retailer automatically.

HMRC’s short export guide explicitly says you must not zero-rate sales if the customer asks you to deliver to a UK address. Do not remove VAT at checkout simply because the buyer supplies Guernsey billing details. A later request supported by onward export records needs review under the detailed Notice 703 conditions; the forwarding certificate alone does not settle it. The shop must establish the appropriate treatment of its actual sale.

What should you check in a proof-of-export request? #

Guernsey Post’s FAQ says the customer can download a Proof of Export Certificate from the delivery confirmation email. It also says retailers may offer a VAT refund but are not legally required to do so simply because the service was used. Ask for the document and review it against your invoice, goods and dates; do not treat the forwarding email itself as your complete tax file.

1. 1

   Connect the goods

   Match the certificate and transport references to the products and quantities on your original sale.

2. 2

   Confirm actual export

   Distinguish receipt at the UK hub from the evidenced onward export and island delivery.

3. 3

   Check the conditions and period

   Review the customer, movement and evidence against the applicable HMRC export rules.

4. 4

   Record the accounting decision

   Retain the documents and any supported adjustment with the original order, along with what you told the customer.

If a document omits information needed to identify the goods, ask the customer or operator for the missing link. If the quantities differ, establish whether there were separate parcels or a partial return. Your review should follow the actual movement. Do not amend the original order’s address retrospectively to make it appear that your first carrier delivered directly to Guernsey.

How can packing choices change the two-leg comparison? #

The forwarding terms determine the final charge at the hub from the item presented there. Excess empty carton space can therefore affect a cost the customer has not yet paid, as well as your own first-leg quote. Pack safely in an appropriate box and give the buyer its finished dimensions when useful. A product’s catalogue measurements are not the closed parcel measurements.

AirPost’s shared fee constants, retrieved on 13 October 2026, allow a narrow origin-work comparison. One qualifying medium parcel has a preparation-plus-platform recommendation of €3.85. Two qualifying small parcels produce €6.20 for the same components, a difference of €2.35. These amounts use the recommended sender fees and the platform constant; the sender’s agreed charge may differ.

Add the actual first-leg labels and the forwarding assessment before deciding which complete route costs less. This calculation does not establish that a particular order can safely become one medium parcel, or that the forwarding operator consolidates separate parcels. It compares two possible preparation plans only after their contents and measurements qualify. It supplies no direct AirPost island service quote.

Through AirPost’s seller arrangement, you can agree packing at an available origin. Keep that work distinct from the customer’s personal forwarding account. For UK stock planning, the UK fulfilment guide covers the first location decision. The domestic and international cost comparison explains why a domestic first leg need not be the entire delivery cost.

What if the customer does not pay for onward forwarding? #

The myUKaddress terms allow a discretionary storage charge if an item stays at the UK depot for more than fourteen days. Do not promise your customer indefinite storage at the hub. The forwarding notification and payment stage are part of their chosen route, so a parcel can be correctly delivered to the hub while onward movement is still pending.

If the buyer contacts your shop at that stage, ask which operator holds the parcel and what action its message requests. Supply the original invoice and first-leg tracking where needed. A request to forward, return or cancel should be handled under the appropriate service terms and your sale obligations. Do not interpret an unpaid forwarding stage as proof that your first carrier lost the goods.

For future orders, offer a direct Guernsey quote where you have an accepted service, or state the limits of delivery to the supplied UK address. You can support the customer’s choice without making their forwarding fee, timing or tax refund a promise your checkout cannot substantiate. The useful cost comparison ends at the customer’s intended destination and preserves each operator’s responsibilities.