Assume the papers were issued by a National Association other than the MSA? From memory it has always been the case that papers have to be re-issued by the the new owner's Association when ownership moves to a different country.
However, I didn't appreciate that meant a new application when papers were still current! Makes the idea of selling a car with new papers not so clever if there is a chance buyer will be from another country. I do know of cars racing on their previously issued papers, despite having changed hands, scrutineers being more interested in the fact that they are current / correct rather than who issued them.... Probably depends on the significance of the car and importance of the event!
Or it may be cheaper to emigrate to the country that issued the papers?