> ## Documentation Index > Fetch the complete documentation index at: https://docs.paypathiq.com/llms.txt > Use this file to discover all available pages before exploring further. # Read an immutable CreditNote > Read back a CreditNote you recorded earlier. Requires financial_corrections:read. Returns source-owned evidence, never private staff content. ## OpenAPI ````yaml /generated/inbound-api-v1.openapi.json get /v1/clients/{clientCode}/credit-notes/{externalEventId} openapi: 3.1.0 info: description: >- Send Customers, Receivables, and Payment observations and related financial evidence from your source system to PayPathIQ, one record at a time or as bounded asynchronous batches, and read back changes. Every operation listed here is implemented; capabilities that are not implemented are not listed. Start in sandbox with a sandbox key and synthetic data. Every error type links to a page at https://docs.paypathiq.com/problems/{code}. title: PayPathIQ Inbound Receivables API version: 1.0.0 servers: - description: Sandbox url: https://api.sandbox.paypathiq.com - description: Production url: https://api.paypathiq.com security: - BearerAuth: [] tags: - description: >- The people and businesses that owe a Client money. Start here: create each Customer before you send Receivables for them. name: Customers - description: >- Individual amounts a Customer owes, each recoverable on its own. Use these to create, read and update the Receivables your system owns. name: Receivables - description: >- Immutable records of payments, refunds and reversals that happened outside PayPathIQ. Use them to tell PayPathIQ when a Customer has paid. name: Payment observations - description: >- Commands that pause, resume, close or reopen recovery on a Receivable. Use them when the Source decides recovery should stop or restart. name: Receivable lifecycle - description: >- Ordered Source balances for up to 100 Receivables. Use them when your system reports balances rather than individual transactions. name: Balance snapshots - description: >- Asynchronous ingestion of up to 100 records in one request, with an exact outcome per record. Use them to load a large book, then poll for the result. name: Batches - description: >- A durable, resumable feed of committed Customer, Receivable and payment changes. Use it to keep your system in step, and to recover after downtime or missed webhooks. name: Changes - description: >- Optional signed notifications that something changed. Use them to know when to read the change feed; each one is a hint, not a copy of the data. name: Webhooks - description: >- Immutable credit notes, adjustments and write-offs issued in the Source. Use them to report a change in what a Customer owes that is not a payment. name: Financial events - description: >- Declarations that a set of batches carried the Source's complete book. Use them so PayPathIQ can hold Receivables that are missing from the book. name: Complete books - description: >- Explicit, revisioned instructions that let PayPathIQ begin recovery for a Receivable. Use them only if your connection starts recovery by instruction. name: Recovery instructions - description: >- Read-only working collection position, holds, commitments and action outcomes for Receivables. Use them to show collection status in your own system. name: Collection summaries - description: >- A read-only check on whether your source data is recent enough for PayPathIQ to act on. Use it to find out why recovery actions are held. name: Source freshness - description: >- Fixed-amount hosted payment pages through the Client's own payment provider merchant. Use them to let a Customer pay a set of Receivables by card. name: Payment requests - description: >- Confirmed Payments that a partner-owned connection delivers to accounting, kept separate from accounting acceptance. Use them if your connection owns receipt delivery. name: Payment delivery - description: >- Acknowledgements that Source receipt lines match a confirmed Payment, and the resolution of any differences. Use them to tell PayPathIQ that accounting has recorded a Payment. name: Payment reconciliation - description: >- PayPathIQ-owned delivery of receipts to the accounting Source, with acknowledgement kept separate. Use it to see or request delivery of a confirmed Payment's receipt. name: Receipt delivery - description: >- This machine-readable API contract. Use it to import the API into your tooling. name: Specification paths: /v1/clients/{clientCode}/credit-notes/{externalEventId}: get: tags: - Financial events summary: Read an immutable CreditNote description: >- Read back a CreditNote you recorded earlier. Requires financial_corrections:read. Returns source-owned evidence, never private staff content. operationId: getCreditNote parameters: - name: clientCode in: path required: true schema: type: string pattern: ^[A-Za-z0-9_-]{1,128}$ - name: externalEventId in: path required: true schema: type: string pattern: ^[A-Za-z0-9_-]{1,128}$ responses: '200': content: application/json: example: type: credit_note amount: amount: '10.00' currency: EUR externalReceivableId: REC_EXAMPLE sourceRevision: 2 effectiveAt: '2026-10-14T12:00:00Z' reason: billing_correction sourceReference: CREDIT_SOURCE externalEventId: EVENT_EXAMPLE acceptedAt: '2026-10-14T12:00:01Z' schema: $ref: '#/components/schemas/CreditNoteResponse' description: Accepted evidence. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '400': content: application/problem+json: examples: malformed_json: value: detail: Request body is not valid JSON. requestId: 29400000-0000-4000-8000-000000000001 status: 400 title: Request body is not valid JSON. type: https://docs.paypathiq.com/problems/malformed_json schema: $ref: '#/components/schemas/Problem' description: Request body is not valid JSON. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '401': content: application/problem+json: examples: invalid_api_key: value: detail: >- API key is invalid, inactive, revoked, or for another environment. requestId: 29400000-0000-4000-8000-000000000001 status: 401 title: >- API key is invalid, inactive, revoked, or for another environment. type: https://docs.paypathiq.com/problems/invalid_api_key schema: $ref: '#/components/schemas/Problem' description: API key is invalid, inactive, revoked, or for another environment. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '403': content: application/problem+json: examples: client_scope_denied: value: detail: >- The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist. requestId: 29400000-0000-4000-8000-000000000001 status: 403 title: >- The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist. type: https://docs.paypathiq.com/problems/client_scope_denied schema: $ref: '#/components/schemas/Problem' description: >- The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '404': content: application/problem+json: examples: financial_event_not_found: value: detail: No evidence exists at this authorized resource URL. requestId: 29400000-0000-4000-8000-000000000001 status: 404 title: No evidence exists at this authorized resource URL. type: >- https://docs.paypathiq.com/problems/financial_event_not_found schema: $ref: '#/components/schemas/Problem' description: No evidence exists at this authorized resource URL. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '413': content: application/problem+json: examples: request_too_large: value: detail: Request body exceeds the 256 KiB resource limit. requestId: 29400000-0000-4000-8000-000000000001 status: 413 title: Request body exceeds the 256 KiB resource limit. type: https://docs.paypathiq.com/problems/request_too_large schema: $ref: '#/components/schemas/Problem' description: Request body exceeds the 256 KiB resource limit. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '415': content: application/problem+json: examples: unsupported_media_type: value: detail: >- Media type or content encoding is unsupported. Send uncompressed application/json for PUT and POST, and application/merge-patch+json for PATCH. requestId: 29400000-0000-4000-8000-000000000001 status: 415 title: >- Media type or content encoding is unsupported. Send uncompressed application/json for PUT and POST, and application/merge-patch+json for PATCH. type: https://docs.paypathiq.com/problems/unsupported_media_type schema: $ref: '#/components/schemas/Problem' description: >- Media type or content encoding is unsupported. Send uncompressed application/json for PUT and POST, and application/merge-patch+json for PATCH. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '422': content: application/problem+json: examples: validation_error: value: detail: >- Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference. errors: - code: invalid_format detail: Invalid ISO date pointer: /dueDate requestId: 29400000-0000-4000-8000-000000000001 status: 422 title: >- Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference. type: https://docs.paypathiq.com/problems/validation_error schema: $ref: '#/components/schemas/Problem' description: >- Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string '429': content: application/problem+json: examples: rate_limit_exceeded: value: detail: >- Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts. requestId: 29400000-0000-4000-8000-000000000001 status: 429 title: >- Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts. type: https://docs.paypathiq.com/problems/rate_limit_exceeded schema: $ref: '#/components/schemas/Problem' description: >- Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string Retry-After: description: >- Seconds until this unchanged request may be retried: 1 after a concurrency rejection, 60 after the per-minute limit. schema: minimum: 1 type: integer '503': content: application/problem+json: examples: projection_unavailable: value: detail: >- An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff. requestId: 29400000-0000-4000-8000-000000000001 status: 503 title: >- An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff. type: https://docs.paypathiq.com/problems/projection_unavailable schema: $ref: '#/components/schemas/Problem' description: >- An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff. headers: Cache-Control: description: Integration-facing responses are never cached. schema: const: no-store type: string PayPathIQ-Api-Version: description: >- Public API contract version; industry profile is fixed by the current Integration grant. schema: type: string const: v1 X-Request-Id: description: PayPathIQ-generated support correlation identifier. schema: format: uuid type: string security: - BearerAuth: [] components: schemas: CreditNoteResponse: type: object properties: amount: type: object properties: amount: type: string pattern: ^(0|[1-9]\d{0,13})\.\d{2}$ currency: type: string const: EUR required: - amount - currency additionalProperties: false externalReceivableId: type: string pattern: ^[A-Za-z0-9_-]{1,128}$ sourceRevision: type: integer exclusiveMinimum: 0 maximum: 9007199254740991 effectiveAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z))$ reason: type: string enum: - billing_correction - contractual_credit sourceReference: type: string minLength: 1 maxLength: 200 type: type: string const: credit_note externalEventId: type: string pattern: ^[A-Za-z0-9_-]{1,128}$ acceptedAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z))$ required: - amount - externalReceivableId - sourceRevision - effectiveAt - reason - sourceReference - type - externalEventId - acceptedAt additionalProperties: false Problem: type: object properties: detail: type: string errors: maxItems: 20 type: array items: type: object properties: code: type: string detail: type: string pointer: type: string required: - code - detail - pointer additionalProperties: false requestId: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ status: type: integer minimum: 400 maximum: 599 title: type: string type: type: string format: uri required: - detail - requestId - status - title - type additionalProperties: false securitySchemes: BearerAuth: bearerFormat: ppiq_test__ or ppiq_live__ description: >- Integration-owned environment-specific API key. Never paste a production key into documentation tools. scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.