The expert reviews, selects and guides the presentation
Catawiki uses in-house experts to decide which objects get in and how they are presented in its auctions.
The official help explains that the experts review objects submitted by sellers, assess characteristics that affect quality and the estimate, help improve photographs and information, and select the appropriate auction. This curation sets Catawiki apart from a purely open marketplace.
But the scope matters: the official estimate page states that the experts do not physically inspect the objects sold on the platform. The review therefore relies on photographs, data and documentation supplied by the seller and other sources.
Selection, review of information, feedback and placement in an auction.
Universal physical inspection or an absolute guarantee of authenticity.
The seller retains material responsibility
Catawiki connects buyer and seller; the sales contract is with the third party.
Catawiki expressly states that it does not sell the objects itself. The seller, whether private or business, is responsible for describing truthfully, meeting legal obligations, packing/shipping and ensuring that the object is legal, authentic and in the condition described.
This allocation of responsibility avoids a common mistake: turning the platform’s selection into a guarantee that replaces the seller. Curation can add information and filter presentations, but it does not remove the need to assess the specific piece.
Build a ladder of evidence, not a binary label
Authenticity rarely depends on a single isolated signal.
Barguvo uses five states: Declared, Observable, Supplied, Confirmed and Unknown. “Signed by X” may be declared by the seller; a signature may be observable in a photo; a certificate may be supplied; a database or laboratory may confirm a specific attribute. Each layer answers a different question.
INCONCLUSIVE means that evidence exists but is not enough for the conclusion; UNKNOWN means the data is missing. Separating them avoids treating uncertainty as proof of fraud.
The quality of a photograph also limits what can be confirmed. A blurred hallmark, a stone lit with a strong colour cast or a dial photographed behind reflections can prevent relevant details from being assessed. Asking for a better image is not distrusting the seller: it is reducing uncertainty before attributing a material characteristic.
For old documents, check internal consistency between dates, names, measurements and descriptions. A legitimate provenance may contain historical cataloguing errors; if a discrepancy appears, keep it as an open question until a more direct source is found. The goal is to reconstruct evidence, not to defend a narrative at all costs.
Categories may require different proof
A watch, a gemstone, a coin and a work of art are not authenticated with the same checklist.
Catawiki publishes category-specific guidelines and may require certificates, serial numbers, laboratory reports, photos of markings, provenance or additional documentation. For gemstones, for example, reports from gemmological laboratories can be essential for technical characteristics; Catawiki itself clarifies that those laboratories are independent entities.
The correct rule is category-specific. Do not invent a generic “Catawiki certificate” or assume that a purchase invoice answers the same question as a gemmological report, a manufacturer’s archive extract or a catalogue raisonné.
Reference, serial, movement, replaced parts and documentation.
Laboratory report, treatments, measurements and quality.
Authorship, technique, provenance, exhibitions and literature.
Edition, printing, condition, specialist certification where it exists.
In art, attribution may depend on provenance, material examination, literature and expert consensus; a visible signature is only one signal. In watchmaking, an authentic case may coexist with a repainted dial, a replaced movement or service parts. In coins, an authentic piece may have a grade or cleaning very different from what is described. The question “is it authentic?” sometimes has to be broken down into several questions about components, intervention and period.
Provenance is not a certificate of authenticity on its own either. An invoice proves a transaction, not necessarily that the original attribution was correct. A well-documented chain of owners can increase confidence and value, but it must be assessed together with the object and the sources supporting the identification.
Where a recognised manufacturer database, archive, foundation or laboratory exists for the category, prioritise the source that directly answers the attribute you want to confirm. A generic image search or a visual match contributes less than a specific reference query. The hierarchy of evidence must reflect competence and traceability, not how convincing a document looks.
There are cases in which no available evidence allows the attribution to be settled. The correct result is INCONCLUSIVE, not “authentic” out of optimism or “fake” out of frustration. That status may justify not bidding, asking for more documents or turning to a specialist; keeping the uncertainty is a legitimate part of the analysis.
Assess who issues the document and what it actually states
“With certificate” is not enough if you do not know its scope, its issuer and its link to the object.
A certificate may attest to material, fineness, partial provenance or an opinion on authorship. Read the whole document: who signs it, the date, the methodology, identifiers and limitations. Check that photos, measurements or serials match the piece on offer.
A blurred copy, a document without traceability or an issuer without relevant competence may be a weak signal. Conversely, the absence of a document does not prove falseness when the category does not require one, although it may reduce confidence or the defensible value.
KYC and a verified profile belong to account identity
An identified person can still be wrong about an object.
Catawiki may ask the seller to verify their identity through Stripe or Payoneer in order to process payments. That check helps establish who is being paid and meet platform requirements. It does not prove the lot’s origin, material, authorship or condition.
The same applies to the seller’s reviews and experience: they provide context about past behaviour, but they do not authenticate a specific piece. Use them as complementary signals, never as a substitute for evidence about the object.
The expert’s estimate does not authenticate either
Expected price and authenticity may be related, but they are not equivalent.
An estimate may use the artist, provenance, material, rarity, condition and historical sales. But Catawiki presents it as a guide to the possible bidding value, not as an objective guarantee. The page itself warns that there is no general physical inspection.
Do not use “estimated at 2.000–3.000 €” as proof that a piece is genuine. If authenticity materially changes the value, the analysis must go back to the specific evidence supporting that attribution.
Signals that justify further checking without declaring fraud
A discrepancy should produce a verifiable question.
Look for contradictions: a visible serial that does not match the document, measurements incompatible with a reference, inconsistent typography or markings, undeclared restoration, impossible provenance or a certificate describing another object. Each signal should be recorded with its evidence.
Avoid magic rules such as “if the price is 30% low, it is fake”. An auction may close low due to weak demand, a bad season or little competition. An anomalous price is a signal for review, not proof.
It may indicate a listing error, a replaced part or a bigger problem. Check a primary source where one exists. The mistake to avoid here is declaring a forgery without cross-checking.
It may reduce traceability. Separate documented periods from unknown ones. The mistake to avoid here is inventing owners to complete the story.
It may affect value and the authenticity of components. Identify what was worked on. The mistake to avoid here is treating any restoration as forgery.
An authentic document may belong to another piece. Compare photos, serials and measurements. The mistake to avoid here is accepting it just because of the letterhead.
Buyer and seller need the same honesty about status
The seller must describe; the buyer must interpret without overstretching the signals.
The seller should present what they know and what they do not know, include relevant documents and not hide defects. The buyer should review that evidence and, if a material claim remains open, ask for clarification before bidding.
When a category requires a specific proof, its absence may prevent selection. When it does not, Barguvo may recommend additional evidence without presenting it as an official Catawiki requirement.
Authenticity and provenance checklist
Do not close the analysis with a badge; close each claim with its best available evidence.
If an important claim rests only on a chain of copies or indirect references, lower the confidence and keep the exact origin of each piece of data. Traceability of evidence allows the analysis to be reviewed later without relying on memory, decontextualised screenshots or the seller’s general reputation.
Catawiki’s help and the specific transaction take precedence over any editorial snapshot.
FAQ
Do the experts physically inspect every object?
No. Catawiki states that the general review does not involve physical inspection of the objects sold on the marketplace.
Does selected by an expert mean guaranteed authentic?
No. The platform reviews and selects, but the seller remains responsible for authenticity, legality, condition and description.
Does the seller’s KYC authenticate the object?
No. It verifies the account’s identity/payouts, not the authenticity of the specific item.
Does a certificate always prove authenticity?
It depends on who issues it, its scope, traceability and the category. It must be assessed as evidence, not as a magic word.
Does a lack of documentation mean forgery?
Not automatically. It may reduce confidence or eligibility, but absence of evidence does not on its own amount to fraud.
Is the expert’s estimate an authentication?
No. The estimate gives guidance on possible bidding value and is a different concept.
Operational information revalidated on 25/08/2026. Sources and licences are kept in the internal record of this checkpoint so as not to overload the public interface.