You MUST use your full legal name, including any/all middle names, as it appears on the electoral roll when filling out the First Name, Middle Name and Last Name fields. We use this information in our identity verification checks.
There is also a field for Preferred Name, which is the name that will be used on your ID card. This allows you to enter the name you are commonly known by (e.g. Pat) as well as your full first name (e.g. Patrick).