> ## Documentation Index > Fetch the complete documentation index at: https://docs.synctera.com/llms.txt > Use this file to discover all available pages before exploring further. # Simulate reversal > A reversal releases the hold that was placed on account funds by an authorization, thus returning the funds to the account. Simulate an `authorization.reversal` type transaction by including the `original_transaction_token` and `amount` in your request. ## OpenAPI ````yaml openapi-v2.json post /cards/transaction_simulations/reversal openapi: 3.0.3 info: description: >- This is the official reference documentation for Synctera APIs. If you need something specific or have a question, contact us.

license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0.html title: Synctera API version: 2.5.0 servers: - description: Production url: https://api.synctera.com/v2 - description: Sandbox (no real world financial impact) url: https://api-sandbox.synctera.com/v2 security: - bearerAuth: [] tags: - description: | Requests to create and manage Rewards name: Rewards (beta) - description: Lookup merchant information name: Merchants - description: Requests to generate simulated webhooks name: Card Webhook Simulations - description: >- Account programs define configurations for payment rails and transaction capabilities across different account types. name: Account Programs - description: >- Testing endpoints to simulate in-store cash deposits. Available in sandbox environments only. name: In-Store Cash Deposit Simulations - description: Simulate receiving ACH transactions and returns name: ACH Transaction Simulations - description: Requests for risk evaluation and decisioning name: Risk Evaluations - description: Create and manage spending controls name: Spend Controls (beta) - description: | The disclosures resource is used to track the status of disclosures and ensure that all parties have been shown the necessary disclosures to meet regulatory obligations. name: Disclosures - description: Create and manage Cash Order and Cash Deposit transfers name: Cash Orders and Deposits (alpha) - description: Rates name: Rates - description: Requests to initiate customer verification. name: KYC Verification (deprecated) - description: Request to create and manage users name: Users - description: See balance history name: BalanceHistory - description: >- Migration mappings associate resources from an old tenant identity with a new tenant identity. name: Migration Mappings - description: | The External Account resource is used for managing links to accounts that operate outside of the Synctera ecosystem. name: External Accounts - description: Requests to create and manage account products, including fees, interest. name: Account Products - description: API for point-in-time account balances name: account_balances - description: Requests to create and manage webhooks name: Webhooks - description: > Vendor-agnostic daily snapshots of a credit account's state (balances, past-due status, per-bucket breakdown). Populated first from LoanPro, but not specific to it. Internal-only: there is no public write path, only an internal sync job. name: Credit Account Daily Snapshots - description: Tenant Config name: Tenant Config - description: Create and manage documents. name: Documents - description: Request to create and manage statements name: Statements - description: >- Create and manage same currency and multi-currency international wire transfers name: International Wires (alpha) - description: FDX authentication and data transfer using Plaid Core Exchange name: Plaid Core Exchange (beta) - description: Create and manage disputes name: Disputes - description: Requests to simulate card payments name: Card Simulations - description: Requests for transaction risk detection name: Transaction risk - description: >- Used to configure bank accounts for which synctera accounts are considered a "subledger" to name: Bank Account - description: >- Aggregated write-off amounts for lending accounts, computed from posted transactions. name: Write Off Amounts - description: | Manage fee products and fee configs for automated fee collection name: Fee Products - description: Apple Pay APIs name: Apple Pay - description: Request to create and manage party groups and party group members name: Party Groups - description: Requests to manage addresses name: Addresses - description: Requests to manage monitoring subscriptions and alerts for customers. name: Monitoring - description: Lending Config name: Lending Config - description: Requests to search and manage compliance searches name: Compliance Searches - description: Requests to create and manage customers name: Customers - description: | The internal account resource is used for managing links to internal accounts where the funds are managed by integrators. name: Internal Accounts - description: Create and manage spending controls name: Spend Controls - description: Payments related to lending accounts name: Payments - description: Retrieve user identity information name: Identity - description: Requests to manage banks name: Banks - description: | The Disclosures resource is used to track the status of disclosures and ensure that customers have been shown the necessary disclosures to meet regulatory obligations. name: Disclosures (deprecated) - description: Manage negative balance processes name: Negative Balance - description: Create and manage wire transfers name: Wires - description: Configuration for mapping LoanPro events to Payola transaction parameters name: LoanPro Transaction Event Config - description: Request to create and manage edd name: Trust - description: Request to enroll, renew, or cancel watchlist monitors name: Watchlist (deprecated) - description: Endpoints for modifying or fetching posting dates name: Posting Dates - description: Requests to generate simulated transactions name: Cash Transaction Simulations (alpha) - description: Transaction lines API name: transactions - description: Request to create and manage accounts name: Accounts - description: Requests to create and manage notes name: Notes - description: Account Template name: Account Templates - description: API for effective balances name: effective_balances - description: Create and manage tenant-level transaction limits name: Tenant Limits (beta) - description: Create and manage transactions name: Transactions (beta) - description: Requests to create and manage personal ID configurations name: Personal ID Configuration - description: > A natural person (individual human) that is relevant to the Synctera platform in some way: e.g. a personal customer or a director/officer/owner of a business. name: Persons - description: > Represents the relationships between parties. A relationship can exist between personal customers, business customers, or non-customer persons/organizations. name: Relationships - description: Autopay payment records for billing periods name: Autopays - description: > A legal entity (corporation, partnership, etc.) that is relevant to the Synctera platform in some way: a business customer or some other organization that has an ownership share in such a business customer. name: Businesses - description: Request to create and manage payment_schedules name: Cronut - description: Requests to manage partners name: Partners - description: Request to create and manage deposits using remote deposit capture name: Remote Check Deposit - description: | Requests to create and manage batch payments name: Batch Payments (alpha) - description: Requests to create and manage API keys name: API Keys - description: Admin API for Middesk configuration using the tenants API keys. name: Middesk - description: > The fintech profile document resource is used to track the approval status of any documents which must be reviewed by a bank. This includes regulatory documents which will be presented to the fintech's end users, and also any documents that help the bank understand the fintech's fitness for duty. name: Fintech Profile - description: Billing rates name: Billing Rates - description: Bank Delinquency Configuration name: Bank Delinquency Configuration - description: >- Rules that map a posted payment transaction (bank/partner + transaction attributes) to a regulatory payment code. NULL match columns act as wildcards. name: Payment Code Configuration - description: Create and manage Synctera Pay templates name: SyncteraPay - description: Manage contacts for bank and fintech partners name: Contacts - description: Create and manage transactions name: Transactions - description: Request to create and manage rdc configurations name: RDC Config - description: Create and manage holds name: Hold - description: Requests to create and manage roles name: Roles - description: | Manage reward products and reward configs for automated cashback rewards name: Reward Products - description: Simulate receiving Wire transactions and returns name: Wire Transaction Simulations - description: Requests to configure vendors. name: Vendor Configurations - description: Requests to create licenses name: Licenses - description: Requests to create and manage card disputes name: Card Disputes - description: Requests to Admins to grant permissions to user name: Request Permissions - description: >- Per bank/partner account-type mapping to FFIEC collateral codes used for regulatory call report furnishment. name: Collateral Code Configuration - description: Configure vendor secrets for egress requests name: Egress Gateway Vendor Secret CRUD API - description: Requests to screen parties against sanctions watchlists name: Sanctions Screening - description: Create and manage payments name: ACH - description: Requests to calculate and manage CRR name: CRR - description: Bulk card issuance name: Bulk Issuance - description: Requests to search financial institutions name: Institutions (Beta) - description: Autopay configuration management for lending accounts name: Autopay Configs - description: Create and manage scheduled transactions name: Scheduled Transactions (internal) - description: Create and manage tenant configurations name: Tenant Configs - description: Create and manage sweep configurations name: Configs - description: > Represents the compliance rules that are used to verify certain kinds of money movement. name: Compliance Rules - description: Configure webhook secrets for egress requests name: Egress Gateway Webhook Secret CRUD API - description: | Saved prefills for the internal transfer form name: Internal Transfer Templates - description: Create and manage barcodes for in-store cash deposits name: In-Store Cash Deposits - description: Create and manage transactions name: Transactions (internal) - description: History name: History - description: Customer Service Details for disputes and billing inquiries name: Customer Service Details - description: Configuration and management of transaction monitoring rules name: Transaction Monitoring - description: Create a credit application. name: Applications (beta) - description: Requests to generate simulated transactions name: Card Transaction Simulations - description: Billing period summaries name: Billing Period Summaries - description: Requests to initiate customer verification. name: KYC/KYB Verifications - description: Requests to grant, list, update, and revoke role bindings name: Role Bindings - description: Requests to issue and manage cards name: Cards - description: Push and pull from cards name: External Cards - description: | Requests to create and manage fees name: Fees (beta) - description: Manage credit disputes name: Credit Disputes paths: /cards/transaction_simulations/reversal: summary: Simulate Reversal post: tags: - Card Transaction Simulations summary: Simulate reversal description: > A reversal releases the hold that was placed on account funds by an authorization, thus returning the funds to the account. Simulate an `authorization.reversal` type transaction by including the `original_transaction_token` and `amount` in your request. operationId: simulateReversal requestBody: content: application/json: schema: $ref: '#/components/schemas/reversal_model' description: Reversal details required: true responses: '201': content: application/json: schema: $ref: '#/components/schemas/simulation_response_model' description: Success '400': $ref: '#/components/responses/bad_request1' '401': $ref: '#/components/responses/unauthorized1' '403': $ref: '#/components/responses/forbidden1' '500': $ref: '#/components/responses/internal_server_error1' components: schemas: reversal_model: example: amount: 80 find_original_window_days: 6 is_advice: false network_fees: - amount: 123 credit_debit: C type: ISSUER_FEE - amount: 123 credit_debit: C type: ISSUER_FEE original_transaction_id: original_transaction_id properties: amount: description: >- The amount of the transaction in the smallest whole denomination of the applicable currency (eg. For USD use cents) type: integer find_original_window_days: format: int32 type: integer is_advice: default: false type: boolean network_fees: items: $ref: '#/components/schemas/network_fee_model' type: array original_transaction_id: format: uuid type: string required: - amount - original_transaction_id type: object simulation_response_model: type: object network_fee_model: example: amount: 123 credit_debit: C type: ISSUER_FEE properties: amount: description: >- The amount of the fee in the smallest whole denomination of the applicable currency (eg. For USD use cents) type: integer credit_debit: description: C = credit; D = debit enum: - C - D type: string type: enum: - ACQUIRER_FEE - CROSS_BORDER_ISSUER_FEE - CUR_CONV_CARDHOLDER_FEE - CUR_CONV_ISSUER_FEE - INTERCHANGE_FEE - ISSUER_FEE - PINDEBIT_ASSOC_FEE - SWITCH_FEE type: string required: - amount - type type: object error1: description: Synctera error responses in API v1 implement a custom error schema. properties: code: description: > A machine-readable string that identifies the error for programmatic use. example: BAD_REQUEST_BODY type: string detail: description: | A human-readable string explaining this particular error. example: 'Missing required fields: first_name, dob' type: string status: description: HTTP status code for this response example: 400 type: integer title: Synctera error response type: object responses: bad_request1: content: application/json: schema: $ref: '#/components/schemas/error1' description: Bad request unauthorized1: content: application/json: schema: $ref: '#/components/schemas/error1' description: Unauthorized forbidden1: content: application/json: schema: $ref: '#/components/schemas/error1' description: Forbidden internal_server_error1: content: application/json: schema: $ref: '#/components/schemas/error1' description: Internal server error securitySchemes: bearerAuth: bearerFormat: api_key scheme: bearer type: http ````