National Insurance Number When you have received your updated ARC card, you will need to apply for a National Insurance Number (often shortened to ‘NI’). If you are in Northern Ireland, you can apply for a national insurance number on the NIDIRECT WEBSITE. If you are in the rest of the UK, you can apply on the GOV.UK WEBSITE. Your new employer may also ask you to complete an Access NI check. This is a criminal history record check which lets your employer know if you have been convicted of a criminal offence or are barred from working with children or vulnerable adults. This is the standard procedure for anyone who works with vulnerable persons. Manage Cookie Preferences