> ## Documentation Index
> Fetch the complete documentation index at: https://docs.truthlocks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Redact Receipt

> Remove PII from a receipt payload while preserving cryptographic proof.

Removes PII from a receipt's payload while preserving the cryptographic proof. The receipt's signature, transparency log entry, and Merkle inclusion proof remain intact — only the `payload_json` is replaced with a redaction marker.

Use this for GDPR right-to-erasure requests on receipts containing personal data.

<Warning>
  Redaction is permanent. The original payload cannot be restored. The cryptographic proof remains valid for audit purposes.
</Warning>

## Path parameters

<ParamField path="id" type="string" required>
  UUID of the receipt to redact.
</ParamField>

## Headers

<ParamField header="Idempotency-Key" type="string" required>
  UUID for idempotent redaction.
</ParamField>

## Response

<ResponseField name="receipt_id" type="string">UUID of the redacted receipt.</ResponseField>
<ResponseField name="status" type="string">`redacted`</ResponseField>
<ResponseField name="redacted_at" type="string">ISO 8601 timestamp of redaction.</ResponseField>

### What changes after redaction

* `status` → `redacted`
* `payload_json` → `{"redacted": true, "redacted_by": "tenant_request"}`
* A `RECEIPT_REDACT` event is anchored in the transparency log
* All other fields (signature, log proof, receipt\_type) are preserved


## OpenAPI

````yaml mint-openapi.yaml POST /v1/receipts/{id}/redact
openapi: 3.0.3
info:
  title: Truthlocks API
  description: >
    Truthlocks is a universal verification infrastructure for documents,
    credentials, and digital assets.

    This specification defines the canonical API for interacting with Truthlocks
    services.


    ## Base URLs

    - **Production**: `https://api.truthlocks.com`

    - **Sandbox**: `https://sandbox-api.truthlocks.com`


    ## Authentication

    - **API Keys**: Use `X-API-Key` header for machine-to-machine operations

    - **Bearer Tokens**: Use `Authorization: Bearer <jwt>` for user-initiated
    operations


    ## Tenant Identity

    In production, tenant identity is derived from the authenticated context
    (API key or JWT).

    The `X-Tenant-ID` header is ignored in production to prevent spoofing.
  version: 1.0.0
  contact:
    name: Truthlocks Support
    url: https://truthlocks.com/support
    email: support@truthlocks.com
servers:
  - url: https://api.truthlocks.com
    description: Production API
  - url: https://sandbox-api.truthlocks.com
    description: Sandbox Environment
security:
  - APIKey: []
tags:
  - name: Authentication
    description: API key and token management
  - name: Issuers
    description: Issuer registration and trust management
  - name: Keys
    description: Cryptographic key management for issuers
  - name: Attestations
    description: Attestation lifecycle (mint, revoke, supersede)
  - name: Verification
    description: Attestation verification and proof bundles
  - name: Governance
    description: Issuer governance workflows (admin only)
  - name: Identity
    description: Organization, user, and role management
  - name: Audit
    description: Audit event queries
  - name: Platform
    description: Platform administration (super admin only)
  - name: Platform Review
    description: Staff review workflows for issuer applications
  - name: Tenant Console
    description: Tenant profile and lifecycle endpoints
  - name: Health
    description: Service health and readiness endpoints
  - name: Risk
    description: Risk signal ingestion and fraud detection
  - name: Risk Enforcement
    description: Risk enforcement actions — block, challenge, quarantine, and configuration
  - name: Billing
    description: Billing, subscription, and addon management
  - name: Machine Identity
    description: >-
      Machine Agent Identity Protocol (MAIP) — agent registration, sessions,
      trust, witness, compliance, orchestration, and observability
externalDocs:
  description: Transparency read-only API (separate service spec)
  url: >-
    https://github.com/truthlocks/truthlock/blob/main/docs/transparency/openapi.yaml
paths:
  /v1/receipts/{id}/redact:
    post:
      tags:
        - Receipts
      summary: Redact receipt
      description: >-
        Redacts sensitive fields from a receipt while preserving the
        cryptographic proof chain.
      operationId: receipts.redact
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
          description: Receipt UUID
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - fields
              properties:
                fields:
                  type: array
                  items:
                    type: string
                  description: JSON paths of fields to redact
                reason:
                  type: string
                  description: Redaction reason
      responses:
        '200':
          description: Receipt redacted
          content:
            application/json:
              schema:
                type: object
                properties:
                  receipt_id:
                    type: string
                  status:
                    type: string
                  redacted_fields:
                    type: array
                    items:
                      type: string
        '401':
          description: Authentication required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorEnvelope'
      security:
        - APIKey: []
components:
  schemas:
    ErrorEnvelope:
      type: object
      required:
        - code
        - message
        - http_status
      properties:
        code:
          type: string
          description: Machine-readable error code
          enum:
            - AUTH_REQUIRED
            - AUTH_INVALID
            - PERMISSION_DENIED
            - TENANT_IDENTITY_UNVERIFIED
            - NOT_FOUND
            - VALIDATION_ERROR
            - CONFLICT
            - PAYLOAD_TOO_LARGE
            - RATE_LIMIT_EXCEEDED
            - QUOTA_EXCEEDED
            - SERVICE_UNAVAILABLE
            - INTERNAL_ERROR
        message:
          type: string
          description: Human-readable error message
        http_status:
          type: integer
          description: HTTP status code
        retry_after_ms:
          type: integer
          description: Milliseconds to wait before retrying (for rate limits)
        details:
          type: object
          description: Additional error context
      example:
        code: AUTH_REQUIRED
        message: Authentication required
        http_status: 401
  securitySchemes:
    APIKey:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key for machine-to-machine authentication

````