Once you have submitted your nomination and it has been forwarded to the foreign country, it is forwarded to the employer. The employer has the right to accept or reject you.
If you are accepted, the receiving IAESTE committee will issue acceptance documents and forward them to you through your home IAESTE committee (either by email or through the Exchange Platform).
If you are rejected, the employer has to provide a proper explanation why and it will be forwarded to you through your home committee.
Lastly, it may also happen that the employer has to cancel the internship for a specific reason (e.g. financial issues, reorganisation...). Your home committee should inform you of such case as well.