National Insurance Number Invalid (&1 &2-&3: Check &4)

What causes this issue?

National Insurance Number Invalid (&V1& &V2&-&V3&: Check &V4&)

System Response

A National Insurance Number (NINO) is made up of two letters, six
numbers and a final letter, which is always A, B, C or D. It looks
something like this: QQ 12 34 56 A. This is an example only and should
not be used as an actual number.
<ZH>The Prefix</>
A prefix is chosen and then used until all the possible numbers have
been allocated. Then another prefix is used but not necessarily the next
one alphabetically.
For all checks before <ZH>April 6th 2017</>, valid NINO prefixes were
defined in <ZH>T5G43</>.
For all checks since <ZH>April 6th 2017</>, invalid NINO prefixes are
defined in <ZH>T5G44</>.
<ZH>The Suffix</>
The suffix dates back to when contributions were recorded on cards which
were returned annually, staggered throughout the tax year. "A" meant the
card was to be returned in March; "B" in June; "C" in September and "D"
in December. Although contribution cards are no longer used, the suffix
has remained an integral part of the NINO. However, not all NINOs have a
suffix.
<ZH>Administrative Numbers</>
For administrative reasons it has sometimes been necessary for HMRC and
DWP to use reference numbers which look like NINOs but which do not use
valid prefixes. The most common administrative prefix used in the past
was : TN
These were Temporary Numbers (TENO) which were used by employers and DWP
when they did not know an individual's NINO.
Since April 6th 2004, employers are no longer permitted to use TN
numbers. If the employer does not know an employee's NINO, they should
leave the NINO blank and enter the employee's date of birth and gender.
<ZH>Checks</>
Check 01 : National Insurance Number must begin with two letters
Check 02 : National Insurance Number Prefix &V1& is not valid (&V2&-
&V3&) in <ZH>T5G43</>
Check 03 : National Insurance Number Prefix &V1& is not valid (&V2&-
&V3&) in <ZH>T5G44</>
Check 04 : National Insurance Number must contain only numbers in
positions 3 to 8
Check 05 : National Insurance Number Suffix must be A, B, C, D or space

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.