To prevent problems with the letters ai files should be converted to a pdf file.Note: before you convert the file, create outlines should be made to the AI to letters, there will be no errors.
To prevent problems with the text. Ai files should be converted to pdf files before converting the AI should create outlines for characters no mistake.
In order to prevent the problem about the letter should convert the file to a file. AI PDF note before the file AI should the create outlines. To font will be no mistake