Sharing MP3 from Amazon

Even if it's late, a few days ago I downloaded an album from Amazon.

The only thing which could be identified as an user ID in the MP3 was one of the tags in the MP3. There was the word "ID" and a long number. You can simply delete these tags by right clicking on the file, Properties and then search for the tag. I used Foobar, but the first method should work too.

Don't know if there are any other methods to safe user IDs in an MP3 file.