You must ensure that your American certificates and documents are legally recognized in the foreign country in order for your company/employer, school/college, or the government to accept them if you are traveling abroad from the United States (U.S.A.) or if you previously worked in the U.S.A. and wish to work in another country, including Canada. If you intend to utilize your certifications in the United States (U.S.A.), you must additionally have them attested by your nation of origin (or the location where the certificate was issued).