For manufacturers · February 10, 2026
How to select samples for testing and not redo the test report
Who takes the samples, how many are needed, and how the sampling act is drawn up.
Home · Blog · Importing samples
A declaration needs test reports, test reports need samples, and importing samples is also an import, and customs asks for documents of conformity. The rules provide a way out, but it works only if you prepare in advance.
Almost every importer finds themselves in this situation at the first delivery: to issue a declaration of conformity, you need test reports, for the test reports you need samples, and samples are also an import, and customs asks for documents of conformity. The circle is closed. The rules provide a way out, but it works only if you prepare in advance.
Products that are subject to mandatory requirements are placed under customs procedures when the documents of conformity are presented. The rule is reasonable: it does not let unconfirmed goods onto the market. But the tests are carried out in the territory of the Union, in an accredited laboratory, so the sample must physically cross the border before the document exists.
This is why the rules have a separate basis: specimens and samples that are imported for studies and tests are not accompanied by documents of conformity. In return, the customs authority is given a justification that explains why these are samples and for what purpose they are imported.
The line between a sample and a commercial batch is drawn not by quantity but by purpose, but quantity is exactly the main sign by which the purpose is checked.
| Sign | Sample | Batch |
|---|---|---|
| Purpose of import | Tests, studies | Sale, use |
| Quantity | As many as the test method requires | Any |
| Further fate | Used up in the tests or returned | Goes into circulation |
| Basis for import | The contract with the laboratory, the justification of the volume | The document of conformity |
From this follows a practical rule: the number of samples is not taken from the air and is not rounded up “just in case”. It comes from the method: how many units are needed for each indicator, taking into account that some tests are destructive. The same calculation then goes into the justification.
| Document | Who provides it | Why |
|---|---|---|
| A contract or an application to the laboratory | The accredited laboratory | It confirms that the tests are really planned |
| A justification letter | Applicant | Name, quantity, purpose of import, details of the laboratory |
| Invoice and packing list | The sender | The description must match the letter word for word |
| A technical description of the goods | The manufacturer | Composition, purpose and characteristics; they show which regulation applies |
The key point here is that the wording must match. If the letter says “samples of LED lamps, 6 pcs” and the invoice says “lamps, 6 pcs” with a trade mark-up and payment terms as in an ordinary deal, the inspector has a reasonable question about what exactly has arrived.
A sample being free of charge does not mean that its value in the declaration is zero. For customs purposes the value is still determined, and the payments are calculated. To state a symbolic price of “1 dollar for everything” in order to save money is a bad idea: an understated value attracts attention faster than anything else, and the proceedings will cost more than you saved.
A sensible approach is to state the real production cost of a unit. It is usually small, the payments on it are small, and it raises no questions.
There are categories where a separate import procedure exists and one letter is not enough: products that need state registration, medical devices and products of animal origin. Samples are imported there as well, but under their own rules, with additional permits. When you plan the schedule, take this difference into account at once. Otherwise the schedule will move by weeks.
Similar scenarios, where the name in the documents does not match the actual goods, are covered in detail in the article on mistakes that delay a shipment.
Importing samples is not a separate task but the first step in preparing for the delivery. If you plan from the end, the order is as follows: determine the applicable regulations and the set of tests; from the set of tests, get the number of samples; prepare the shipment for this number; and only then agree the terms of the main batch with the supplier. The opposite order, with the contract and prepayment first and the clarification of the requirements afterwards, is the main reason for missed deadlines.
How to build the whole route, from negotiations with the factory to the sale, is explained in the article on importing from China. The rules of sample selection and of issuing the record are in the article on sample selection.
For manufacturers · February 10, 2026
Who takes the samples, how many are needed, and how the sampling act is drawn up.
For importers · July 19, 2026
What to decide before prepayment, what to ask the factory for, and how everything fits together at the border.
For importers · June 12, 2026
What most often stops a shipment, and how to prevent it in advance.