Most examinations with the PVVET require pre-registration. One of the registration steps requires the applicant to obtain a FRN if they don't currently have one.  Those showing up to the examination should have a FRN. It's very easy to do. It takes a couple minutes and the FCC will instantly issue you a number.
There are some special situations where the PVVET will host examinations that accept walkins without having to pre-register. We still require the applicant to obtain a FRN prior the examination date.
If an applicant shows up to the examination that allows walk-ins without a FRN, the PVVET will have the applicant attempt to obtain an FRN using the FCC's CORES website. If there is a lack of internet connection or the applicant is not successful in obtaining an FRN, the applicant will be denied an examination.
It's policy of the PVVET to not accept Social Security Numbers (SSN) under any circumstances.