The recommendation letter must be made in multiple copies, that is, print multiple copies, and each copy should be signed by the teacher who signed the recommendation letter. Of course, you cannot mention the specific school and major you are applying for in your recommendation letter, otherwise it will be troublesome and error-prone. If a school requires you to write one, prepare it specifically for it. It's not troublesome, just change it according to his request. It is recommended that you prepare a scanned copy signed by the name of the recommender, because you can submit an electronic version of the recommendation letter when applying online. It is best for the teacher to have a word version of the recommendation letter or a signed scanned copy, because some schools require you to fill in the recommender's email address when applying online, and then they will ask the recommender to submit the recommendation letter in person. Note that the paper on which the recommended credit is printed must be A4 paper with the school's name on it. It probably won't work without the school's name on it. If you need to mail a recommendation letter, please remember to seal it and ask the recommender to seal it by pressing the line on the edge of the envelope, and then put the small envelope into the large EMS envelope. Put each recommendation letter in a separate small envelope and label it with your application no, course, applicant name and other information. Specific requirements can be found on the school website or by sending an email.
If you have any more questions, you can ask them again~ I’ll send the answers to your email~