Whether the authorizations issued by Polish institutions will be valid abroad depends on the regulations in force in a given country. Polish documents may or may not be recognized in countries where the system of regulation of the profession is similar. The European Union countries have signed the directive on mutual recognition of their qualifications. Also Norway or Switzerland, Polish entitlements can be recognized and exchanged for those issued by these countries. Unfortunately, in some countries the UDT qualifications or others are not universally recognized documents and, even after translation, they are not recognized. When choosing to work in such a country, it is worth having a certificate in English issued by the UDT - CERT unit. The center can also issue a training completion certificate in line with international standards. Both documents are recognized all over the world. Their release involves an additional fee.