TCM0290150 - Tax Credits Manual - HMRC internal manual
If you are dealing with a claim for the first time, go to Step 2. If you are dealing with an expired action date for a TC1125, go to Step 4. If you are dealing with a returned TC1125, go to Step 5. If you are dealing with a reply from the United Kingdom Border Agency (UKBA) or National Document Verification Team (NDVT), go to Step 6. If you have received a NINO from Specialist Tracing Unit (STU) or the BF has expired on your request, go to Step 22. Step 2 access function ‘Manage Verification ...
United Kingdom San Marino National Document Verification Team United Kingdom Border Agency European Convention On Renewals Team
Source: gov.uk