Applications are made on an IELTS Application Form which you can send or take into a test centre, along with the test fee, two passport sized photographs, and a photocopy of your passport/national identity card. You will also need to include your passport number, or in some circumstances a national identity card number, on the application form – check with your test centre.
Once you have applied, the test centre will confirm your IELTS test date and time.
On the test day, make sure you bring the same evidence of identity as the number entered on the Application Form.