> ## Documentation Index > Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt > Use this file to discover all available pages before exploring further. # Create bank transfer return operation > Gives back, by STR0010 (devolução de transferência indevida), a TED credit this institution received. Prerequisite: the {operationId} path segment names the received credit, an INBOUND bank-transfer operation from STR0004R2..STR0008R2 in status DELIVERED — read it via getOperation (GET /v1/str/operations/{operationId}); any other operation answers SPB-3006. The body carries only the reason (returnCode) and an optional description: the debited and credited ISPBs (this institution, then the credit's sender), the amount (the credit's full amount) and NumCtrlSTROr (the credit's NumCtrlSTR) come from the received credit, and a credit that names another institution as credited is refused. A credit is returned once: a second return while one stands answers 409 (a rejected or failed one leaves the credit returnable). The accepted operation is RETURN_REQUESTED and its protocolMetadata.nuOp is the STR0010's NUOp, the key its STR0010R1 answer and the settlement fact carry; an Efetivado STR0010R1 settles it as its own transfer and closes the operation RETURNED. Above the client's alçada band the frame parks (status PENDING_APPROVAL) and leaves for the STR only when the quorum signs; a denial or expiry ends it without dispatch. Idempotent — the X-Idempotency key lives with the operation: the same key and parsed request (member order and whitespace do not count; any other difference, such as number spelling, null for an absent field, or an unknown member, is another request) answer the stored operation with X-Idempotency-Replayed: true, also after X-TTL has dropped the cached response, and the same key with another request answers 422. ## OpenAPI ````yaml /pt/openapi/v3-current/spb.yaml post /v1/str/operations/bank-transfers/{operationId}/returns openapi: 3.1.0 info: contact: email: contact@lerian.studio name: Lerian Studio url: https://lerian.studio description: >- OpenAPI 3.1 surface for Lerian SPB, the direct integration between the institution and the Brazilian Payment System (SPB) over the National Financial System Network (RSFN). It covers the Reserve Transfer System (STR): message registry and capability catalog, operation lifecycle (bank transfers, IBS repasses, liquidity transfers, returns and cancellations), reserve-account and schedule queries, alçada governance, SME and LDL operations, inbound quarantine triage, reconciliation, and event delivery. license: name: Lerian Studio General License title: Lerian SPB API version: 1.0.0 servers: - url: https://api.example.com description: >- Replace the example host with the URL provided during environment onboarding. security: [] tags: - description: Immutable audit-record trails for STR operations and lifecycle events. name: Audit - description: >- STR capability catalog describing supported message types and their constraints. name: Capabilities - description: >- ICP-Brasil certificate inventory with hot-reloadable rotation and activation. name: Certificates - description: >- STR compulsory-movement (RCO) family: the movements BACEN orders on a participant's reserve account, their answers and the periods they belong to. name: Compulsory - description: >- Maker-checker approval queue for emissions parked above their alçada band: list pending, sign (approve), and deny. name: EmissionApprovals - description: Operation event catalog enumerating the emitted domain event types. name: Events - description: >- Inbound GEN-family notice log (GEN0001 connectivity echo, GEN0004 transmission error, GEN0005 administrative notice). name: GenNotices - description: >- SPB alçada governance config: value-band table + per-message-type signature requirements, hot-reloaded at runtime. name: Governance - description: >- Read raw STR message status: list messages and read a single message by NUOp. name: Messages - description: Aggregated operational summaries and metrics across STR operations. name: OperationalIntelligence - description: >- STR operation lifecycle for bank transfers and IBS repasses, including returns and cancellations. name: Operations - description: >- Service readiness state covering startup self-probes and dependency health. name: Readiness - description: Reconciliation cases and the actions that resolve operation discrepancies. name: Reconciliation - description: >- Redesconto do Banco Central: collateralised intraday and one-business-day BCB lending against Selic-registered federal securities. One create door derives the nine RDC commands from four operator-facing kinds (contract, payment, conversion, cancellation), plus the two consultas over eligible-security prices and open positions. An accepted rediscount is not necessarily a settled one — Selic may hold the request for want of securities, and that middle state is reported as its own. name: Rediscounts - description: >- STR Relatórios suite: synchronous, date-ranged aggregate reports (movimento financeiro, transações rejeitadas, volumetria) over Lerian SPB's own transmission record. name: Reports - description: >- STR0013 reserve-account balance and STR0014 statement (extrato, message-mode) queries and their async results. name: ReserveQueries - description: >- GEN0019 participant responsável roster: full-replacement updates announced to BACEN. name: Responsibles - description: STR operating-window schedule governing when operations may be sent. name: Schedule - description: >- STR0001 single-party schedule queries (consulta de horários do STR) and their async STR0001R1 grid results. name: ScheduleQueries - description: >- STR lançamentos (SLB) family: the charges BACEN raises against this participant, the payments that settle them, payments to BACEN it never demanded, and the entry consultas over them. name: SLB - description: >- Reads over an IEME's conta correspondente a moeda eletrônica (CCME): SME0003 statement (extrato) queries and their async SME0003R1 results, plus the log of SME0001R2/SME0002R2/SME0004R2 movement advices the STR delivered about movements this rail did not command. name: SMEQueries - description: Runtime SPB configuration settings for the STR integration. name: Settings - description: >- Flow (mandatory order): certificate → readiness → connectivity-test → submit. Activate a certificate, confirm the rail reports ready, pass a connectivity test, then submit an operation. Each step is its own resource; a submit must not be attempted before readiness passes. name: onboarding - description: >- Flow (mandatory order): parent operation SETTLED → return/cancel. A return or cancellation is a sub-resource of a settled parent operation; the {operationId}/{endToEndID} path segment enforces the parent structurally. name: lifecycle paths: /v1/str/operations/bank-transfers/{operationId}/returns: post: tags: - Operations - lifecycle summary: Create bank transfer return operation description: >- Gives back, by STR0010 (devolução de transferência indevida), a TED credit this institution received. Prerequisite: the {operationId} path segment names the received credit, an INBOUND bank-transfer operation from STR0004R2..STR0008R2 in status DELIVERED — read it via getOperation (GET /v1/str/operations/{operationId}); any other operation answers SPB-3006. The body carries only the reason (returnCode) and an optional description: the debited and credited ISPBs (this institution, then the credit's sender), the amount (the credit's full amount) and NumCtrlSTROr (the credit's NumCtrlSTR) come from the received credit, and a credit that names another institution as credited is refused. A credit is returned once: a second return while one stands answers 409 (a rejected or failed one leaves the credit returnable). The accepted operation is RETURN_REQUESTED and its protocolMetadata.nuOp is the STR0010's NUOp, the key its STR0010R1 answer and the settlement fact carry; an Efetivado STR0010R1 settles it as its own transfer and closes the operation RETURNED. Above the client's alçada band the frame parks (status PENDING_APPROVAL) and leaves for the STR only when the quorum signs; a denial or expiry ends it without dispatch. Idempotent — the X-Idempotency key lives with the operation: the same key and parsed request (member order and whitespace do not count; any other difference, such as number spelling, null for an absent field, or an unknown member, is another request) answer the stored operation with X-Idempotency-Replayed: true, also after X-TTL has dropped the cached response, and the same key with another request answers 422. operationId: createBankTransferReturnOperation parameters: - description: Operation UUID of the received TED credit being returned. in: path name: operationId required: true schema: description: Operation UUID of the received TED credit being returned. type: string - description: Idempotency key. Required on every mutation. in: header name: X-Idempotency required: true schema: description: Idempotency key. Required on every mutation. type: string - description: >- Seconds the cached response is kept; it may only shorten IDEMPOTENCY_DEFAULT_TTL_SEC. The key itself lives with the operation. in: header name: X-TTL schema: description: >- Seconds the cached response is kept; it may only shorten IDEMPOTENCY_DEFAULT_TTL_SEC. The key itself lives with the operation. type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/CreateBankTransferReturnRequest' required: true responses: '201': content: application/json: schema: $ref: '#/components/schemas/OperationAcceptedResponse' description: Created headers: X-Idempotency-Replayed: schema: description: >- true when the X-Idempotency key already holds an operation: the body is that operation and nothing new was sent to the STR. type: string links: prerequisite: description: >- Lifecycle prerequisite: the operation read by getOperation must be a received TED credit (INBOUND, STR0004R2..STR0008R2) in status DELIVERED before a return is accepted. operationId: getOperation '400': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Bad Request '401': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unauthorized '403': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Forbidden '404': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Not Found '409': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Conflict '413': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Request Entity Too Large '415': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unsupported Media Type '422': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unprocessable Entity '429': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Too Many Requests '500': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Internal Server Error '503': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Service Unavailable '504': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Gateway Timeout default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: CreateBankTransferReturnRequest: additionalProperties: false properties: description: description: Optional free-text description of the return (Hist). examples: - Wrong account type: string metadata: additionalProperties: {} description: >- Opaque client-side metadata forwarded verbatim to the legacy submit DTO; not persisted on the return intent. type: object returnCode: description: >- BACEN return reason (CodDevTransf) of the STR0010: one of the codes the BACEN dicionário de domínios keeps active, without a leading zero (type CodDevTransf, Catálogo v5.13 Vol IV). The retired 10-14, 78, 79 and 81 are refused. enum: - '1' - '2' - '3' - '4' - '5' - '6' - '7' - '8' - '9' - '15' - '16' - '17' - '18' - '19' - '20' - '21' - '22' - '23' - '24' - '25' - '26' - '27' - '28' - '29' - '31' - '40' - '51' - '52' - '53' - '61' - '63' - '68' - '69' - '70' - '71' - '72' - '73' - '74' - '75' - '76' - '77' - '80' - '82' - '83' - '84' - '85' - '86' examples: - '1' type: string required: - returnCode type: object OperationAcceptedResponse: additionalProperties: false properties: acceptedAt: description: UTC RFC 3339 timestamp at which the command was accepted. examples: - '2026-05-06T18:30:00Z' format: date-time type: string capabilityId: description: >- STR capability identifier resolved for the accepted operation (e.g. STR0004). examples: - STR0004 type: string correlationId: description: >- Request correlation identifier for tracing the accept across logs and traces. examples: - req-7c8b3a2e-9f1d-4a55-9b8e-1e1234567890 type: string isReplay: description: >- True when this response replays a prior idempotent accept rather than creating a new operation. examples: - false type: boolean operationFamily: description: >- Operation family the accepted command belongs to (e.g. bankTransfer). enum: - bankTransfer examples: - bankTransfer type: string operationId: description: >- Server-assigned operation aggregate UUID used for subsequent status, return, and cancellation calls. examples: - 7c8b3a2e-9f1d-4a55-9b8e-1e1234567890 format: uuid type: string protocolMetadata: $ref: '#/components/schemas/OperationProtocolMetadata' description: >- Optional SAFE protocol correlation fields; present once the operation is mapped to STR wire identifiers. status: description: >- Current control-plane lifecycle status of the operation; ACCEPTED on initial accept. enum: - ACCEPTED - SUBMITTED - SENT - CONFIRMED - REJECTED - FAILED - PENDING_CONFIGURATION - PENDING_RECONCILIATION - RETURN_REQUESTED - RETURNED - CANCEL_REQUESTED - CANCELLED - RECEIVED - DELIVERED examples: - ACCEPTED type: string required: - operationId - operationFamily - capabilityId - status - acceptedAt - isReplay - correlationId type: object Detail: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). type: string correlationId: description: Request-scoped correlation identifier echoing X-Request-ID. examples: - req-7a3f9c2e type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string upstream: $ref: '#/components/schemas/Upstream' description: >- RFC 9457 extension member: the error a proxied third-party provider reported. Absent unless the emitting service explicitly surfaced one. required: - correlationId type: object OperationProtocolMetadata: additionalProperties: false properties: controlNumber: description: >- Control number identifying the message on the SPB network (official ControleIF, 1-20 characters); an issued number is an 8-digit movement date + a 12-digit sequence. examples: - '20260506000000000001' maxLength: 20 minLength: 1 type: string emissionApprovalId: description: >- Set when the alçada band parked this request: its id in GET /v1/str/emission-approvals. Only the accepted answer carries it; GET never does. type: string nuOp: description: >- STR operation number (NUOp), 23 characters: 8-character alphanumeric ISPB + 8-digit date + 7-digit sequence. examples: - '12345678202605060000001' maxLength: 23 minLength: 23 pattern: ^[0-9A-Z]{8}[0-9]{15}$ type: string type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object Upstream: additionalProperties: false properties: code: description: The upstream provider's own error code, verbatim. examples: - E4001 type: string message: description: >- The upstream provider's own error message, verbatim (bounded, never its raw response body). examples: - account not found at provider type: string type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.