No Fonts or Links, Sometimes No Worries
Sometimes you'll encounter files with missing fonts, or links that aren't included. We have some tricks up our sleeves to at least view those files if not use them.
If you open your file and are Missing Fonts or Links, instead create a New File. Once your file is made, now you can Place the art file on your new file instead of Opening it Direct. Navigate to File < Place... and Place your File.
Now that your file is Placed it has an X meaning you cannot edit it. This will properly display any Fonts or Links that are not Embedded or Outlined.
From here we can then Navigate to Object < Flatten Transparency... and with the Convert All Text to Outlines ticked, Click OK and it will create outlines around the Fonts we don't have.
This generally only works with basic files, if the file has transparency, or is to complex it will not work and we'll require the customer to send art with outline created or links embedded. But typically this workaround can save a lot and back an forgathe trying to get usable files.