Support is not answering for a week - which is a bad sign i know but i somehow need to get my NEUMARK sold...
Greetings!
Are you from the UK?
National Insurance Number is basically that number that helps track your Insurance contributions and tax records -
https://www.gov.uk/national-insurance/your-national-insurance-numberThe Number of your document is probably that number on your Government Issued National ID or passport. Which ever document you have uploaded for verification.