When you apply for NINO an interview is needed they will arrange a time that is convenient for you and they can often help you avoid it altogether. They will help you have all the documentation to verify your identity. If you have an address change they will help you deal with that appropriately.
The process of getting a National Insurance number will take on average of about 2 to 6 weeks but occasionally months from the time you first schedule a meeting. This is largely dependent on the availability of an interview time with the DWP office, as well as the time that it takes to actually get your number fully processed. While you are waiting you’ll be given a temporary National Insurance number but this is used only to keep track of extra contributions that you will make until you get your actual NI card and present it to your employer.
In order to maximize how fast the process is completed and to avoid a lot of the frustrations, there are some paid services that can help you. If, as an example, you are not from EU then this service can help you avoid going to the DWP interview. The reason this is possible is because of the requirements you had to make to get your visa and this means it’s possible to get your insurance number online.
Being able to avoid the interview is worth paying a small fee but even for those who do need to go to the interview, the service will make things run smoothly. One of the problems many people run into is a failure to have something needed at the interview and the service can help you avoid this. They will help with the application form as well as making an address change if necessary. A failure to do this correctly can cause delays in getting your number. Having the help of this type of service avoids a lot of problems. It is possible to do it yourself, however, and we can help you do that.
Source: https://ninoapplication.com/apply-for-nino/
NINO Application