"Papers included" appears in almost every horse advertisement, and the price is often set accordingly. But what those papers actually say — and what a string of predicates behind the dam's name is worth — remains a guessing game for many buyers. This guide explains which documents belong with a horse, how to read a pedigree, and what predicates do and don't tell you.
A Passport Is Not a Studbook Paper
First, the distinction that trips people up most often. Every horse in the Netherlands must have a horse passport with a microchip — that's a legal identification requirement and says nothing about pedigree or quality. Studbook papers (the pedigree or registration document from a studbook) are something else: they document who the sire and dam are and which register the horse is entered in.
A horse without studbook papers can be a perfectly good riding horse. But then the pedigree can't be verified, the horse is excluded from breeding within that studbook, and it's demonstrably worth less at resale. For a buyer, "no papers" isn't a disqualifier, but it is a fact that should be reflected in the price.
The Studbooks You'll Come Across
| Studbook | What it's for |
|---|---|
| KWPN | The largest Dutch studbook for sport horses, with separate breeding directions for dressage and show jumping (plus harness horses and the Gelderland horse) |
| KFPS | The Friesian horse |
| NRPS | Riding horses and ponies, relatively open to different bloodlines |
| Welsh, NWR, Shetland, and others | Pony studbooks, by breed |
| BWP, sBs, Zangersheide | The major Belgian sport horse studbooks, commonly seen with horses imported from Flanders |
| Hannoveraner, Oldenburger, Holsteiner, and others | German regional studbooks, commonly seen with horses imported from Germany |
For competing, the studbook itself matters little — a good horse jumps just as high with Belgian papers as with Dutch ones. For breeding and resale, it does matter: predicates and inspection results can only be read within their own studbook system.
Predicates: The Report Card From the Inspection Arena
Predicates are distinctions a studbook awards based on inspections, performance testing, or results. The KWPN system is the best known in the Netherlands; the main levels, from lowest to highest:
- Ster, Keur, Elite — increasingly demanding assessments of conformation and movement (and, for the higher predicates, demonstrated ability), awarded at studbook inspections. Especially for mares, a common measure of breeding quality.
- Sport — awarded based on a horse's own results in competitive sport at a set level.
- PROK — a radiographic predicate: the horse's X-rays met the studbook's standard. It says something about bone quality at the moment the images were taken, not about the rest of the horse.
- Preferent and Prestatie — breeding-merit predicates: they're earned through the quality or competition results of a horse's offspring. A Preferent dam, then, tells you something about what the maternal line produces.
- IBOP and EPTM — not predicates but performance tests: standardized tests of rideability and aptitude, whose results come with the papers as a scored report.
The exact requirements for each predicate differ by studbook and are regularly revised — anyone who wants the precise details for a specific horse should check the studbook's own website (for KWPN: kwpn.nl, which includes a public database with pedigree, predicates, and competition results per horse).
One rule of thumb matters more than any of the definitions: predicates on the maternal line say something about breeding value, not about the horse standing in front of you. A foal out of an Elite-Preferent mare has a valuable pedigree — but only the horse's own performance proves whether this particular horse is pleasant to ride. The same applies to breeding values: statistical estimates at the population level, useful for breeders, too coarse-grained for buying a single individual.
What Papers Don't Tell You
Studbook papers document ancestry and assessed aptitude. They say nothing about temperament, about the match between this horse and you as a rider, and nothing about its health today — that's what the pre-purchase veterinary exam is for. The right order when buying a horse is therefore: first assess whether the horse suits you (see the guide on which breed and temperament suit a beginner for that consideration), then check the papers, then have the horse vetted.
Check the practical details at purchase: does the chip number in the passport match the studbook database entry for this horse, are the papers registered in the seller's name, and will they be handed over on delivery? Papers that are "somewhere, we'll find them" or "will be sent on later" are a classic problem — arrange the handover in the purchase contract.
In Short
- Passport = legal identification (mandatory); studbook papers = pedigree and registration (value-determining).
- KWPN is the largest Dutch sport horse studbook; predicates such as Ster, Keur, Elite, Sport, PROK, and Preferent can only be read within their own studbook.
- Predicates on the maternal line describe breeding value — the horse's own performance counts for more as a buyer.
- Papers say nothing about temperament, fit, or current health; that's what test rides and the pre-purchase exam are for.
- Check the chip, registered ownership, and physical handover of the papers, and record that in the purchase contract.
See also: The pre-purchase exam: what the results mean · Buying your first horse: what to look for · Which breed and temperament suit a beginner rider · Glossary: studbook · Level: Considering Your Own Horse