Every cross-border parcel needs accurate paperwork: a commercial invoice, a description, a commodity code, a value, and the country of origin. Wrong commodity codes are the costliest error. The choice between DDP and DDU determines who pays duties and how the customer feels, and liability for mistakes usually stays with the seller.
Customs is where many sellers lose money without noticing. A parcel is held, a duty bill is higher than expected, or a customer refuses delivery, and the cause is almost always something filled in incorrectly at the start.
Which Documents Does Every Cross-Border Parcel Need?
The core set is small. A commercial invoice states what is in the parcel, its value, and who is buying and selling. A customs declaration, often generated by the carrier’s system, carries the same data to the border authority. Depending on the route, postal shipments may also need a CN22 or CN23 label.
Some goods need more. Food, cosmetics, electronics, and anything restricted may require certificates or licences. Preferential duty rates need proof of origin. Sellers choosing from the best fulfilment companies UK should ask each provider whether it produces this paperwork automatically from your product data, since doing it by hand does not scale.
Whichever route you take, the description must be specific. “Gift” or “clothing” invites questions, whereas “women’s knitted cotton jumper” does not.
What Are Commodity Codes, and Why Is Getting Them Wrong Expensive?
A commodity code, also called an HS code, is a numeric classification that tells customs what the product is. The first six digits are shared internationally, and countries add further digits for their own tariffs.
The code decides the duty rate, whether restrictions apply, and which statistics the goods fall under. An incorrect code can mean paying duty that wasn’t due, or underpaying and facing penalties later. Because the same code usually applies to every parcel of that product, one mistake can repeat hundreds of times.
Set the codes once, carefully, and check them. Official tariff tools from the UK government and the EU list codes by product type, and a customs broker can confirm difficult ones.
DDP or DDU: What Does Each Do to the Customer?
Delivered Duty Paid means you collect and pay duties and taxes up front, usually at checkout. The customer pays one price and receives the parcel without further bills. Delivered Duty Unpaid leaves the customer to pay on arrival.
DDP costs more effort and requires upfront cash, but it reduces refusals, support queries, and bad reviews. DDU looks cheaper at the basket, but a surprise bill and a courier handling fee often sour the experience. For most consumer sales, DDP is the better choice, especially in markets with low duty thresholds.
Who Is Liable When It Goes Wrong?
Usually the seller, as the exporter of record. If the declaration is false or incomplete, penalties, delays, and unpaid duties can all land with you, even if a carrier or provider filled in the form. A fulfilment partner may prepare the data, but you remain responsible for its accuracy.
Reduce the risk by keeping records of invoices, codes, and proofs of origin for several years, and by agreeing in writing who handles declarations, duty payments, and returns of held parcels. Review the arrangement whenever you add products or markets.
Frequently asked questions
What documents does an international parcel need?
A commercial invoice, a customs declaration, and sometimes certificates, licences, or proof of origin.
What is a commodity code?
A numeric product classification used by customs to set duty rates and restrictions.
Is DDP better than DDU?
For most consumer sales, yes, because customers avoid surprise bills and refusals fall.
Who is responsible for customs errors?
Generally the seller, even if a carrier or provider prepared the paperwork.
How long should I keep customs records?
Several years, often at least four to six, depending on the country.
