To prevent problems with the letters ai files should be converted to a pdf file.Note: before you convert the files to create AI should be done prior to font outlines are not errors.
To prevent problems with the text. Ai files should be converted to pdf files before converting the AI should be to create outlines before the letter is 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. Prior to the letters will be no mistake