> For a complete page index of the Captain API documentation, fetch https://docs.captain.dev/llms.txt?excludeSpec=true

# Compliance PII Entities

* **Four compliance entities**: `mask_pii` now detects `US_NMLS_ID`, `US_SURETY_BOND_NUMBER`, `SURETY_COMPANY`, and `SURETY_BOND_PRINCIPAL`. Entities are label-anchored, so loan numbers, NAIC codes, and amounts on the same form stay readable. See [PII Masking](/guides/pii-masking).