| Document classifier | Classifies uploaded files before a document-specific verifier runs. |
| Passport verifier | Extracts passport metadata and checks the document is readable and not expired. |
| Proof of address verifier | Extracts address evidence metadata and checks the document is readable. |
| VAT certificate verifier | Extracts VAT registration metadata and checks the VAT number format. |
| Bank statement verifier | Extracts bank details and statement period metadata from bank statement files. |
| Company auth code verifier | Extracts Companies House authentication codes from client text. |
| Company UTR verifier | Extracts and validates likely 10-digit company UTR values. |
| Engagement letter verifier | Checks returned engagement letters for signature and date evidence. |
| Direct debit mandate verifier | Checks mandate/account fields and signing evidence. |