The phrase "accreditation letter" is correct and usable in written English.
You can use it when referring to a formal document that certifies an institution or program meets certain standards.
Example: "Please submit your accreditation letter along with your application to ensure eligibility."
Alternatives: "certification letter" or "validation letter".
Egypt's State Information Service says that the team was working without broadcast permits, providing a copy of an accreditation application letter from Al Jazeera that lists three staff members but none of those who have been detained.
But, at one of the side entrances, the Porta Sant'Anna to the north of St Peter's, if you have accreditation or a letter of authorisation, the guards in their florid Renaissance uniforms will wave you through.
The collaborative approach consisted of post-graduate educational allowance accreditation and a letter from the pharmaceutical advisor asking the practice to agree to see a representative.
An Egyptian who was said to have given a letter of accreditation to two men who posed as television journalists to assassinate the Afghan rebel leader Ahmed Shah Massoud was charged today with conspiracy under Britain's antiterrorism law.
Two days later, Dupont announced that he had issued a letter of accreditation to Reedman for presentation to Nogueira.
Rhodesia had simply asked to have Reedman head a representative office in Lisbon, and he would not present a letter of accreditation.
The Portuguese Ministry of Foreign Affairs, which insisted it was neutral regarding Rhodesia, accepted his letter of accreditation, much to Whitehall's consternation, though Lisbon was careful to avoid provoking Britain, omitting the word "diplomatic" from the titles given to both Reedman and his mission.
He said that the letter of accreditation would confer on Reedman the title of "Accredited Diplomatic Representative", and that Reedman would thereafter head the "Rhodesian Diplomatic Mission" in Lisbon, which would operate on the same level as the Rhodesian office in Pretoria.
RBST accredited and awaiting organic accreditation.
