Certification of English ProficiencyTo whom it may concern,With this letter I would like to certify Mr. XXX(born onXXX) has adequate English proficiency. He is highly welcomed at the institute of XXX of XXX to pursue his PhD. Based on his emails and English publications, I can confirm that Mr.XXXs English level is sufficient to work in my institute so that no more English language tests will be required on him.I wish XXX all the best for the application.Best regardsSincerely,Prof. XXX
