What does it mean?

[jnathan]

Hi, My sis has got an email from the US embassy in Canada. They required the following things.

o The notice of suspension letter received at your interview.

o        Your passport (must be valid for at least 6 months beyond your intended stay in the United States).

o        A self-addressed, prepaid express envelope, if we do not already have one on file for you.

o        NO electronic items, food or liquids.

But what did they mean by : The notice of suspension letter received at your interview.