I have only temporary NI number, can I apply for a proper NI number?

Hello, I have a temporary NI number. Will it be possible to apply for an proper NI number? I am not a UK citizen, nor a UK resident. I have a property in the UK and have been paying income tax using the temporary NI for more than a decade now. However, as it is only a temporary NI there are a lot of online services I cannot use as my temporary NI number is not recognised... there is a letter missing at the end.

Hi,
You can only apply for a UK National Insurance number (NINO) if you need one.
The temporary NINO you have is probably an administrative one set up when your Self Assessment record was created. It has no link to any National Insurance record.
If you feel that you need a UK NINO, the guidance on how to apply is here:
Apply for a National Insurance number
Thank you.
 

Thanks for the link.