# Nacha Written Statement of Unauthorized Debit (WSUD) API

**Canonical:** https://apis.io/apis/nacha/nacha-written-statement-of-unauthorized-debit-wsud-api/  
**Provider:** Nacha — https://apis.io/providers/nacha/  
**Base URL:** https://api.asig.org/v1  
**Documentation:** https://app.swaggerhub.com/apis/ASIG/Initiate_Payment/1.0.7

Nacha Written Statement of Unauthorized Debit (WSUD) API is one of 19 APIs that [Nacha](https://apis.io/providers/nacha/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Written Statement of Unauthorized Debit (WSUD). The published artifact set on APIs.io includes an OpenAPI specification, an API reference, and API documentation.

The Written Statement of Unauthorized Debit (WSUD) API from Nacha — 1 operation(s) for written statement of unauthorized debit (wsud).

## Operations (1)

| Method | Path | Summary |
|---|---|---|
| POST | `/transactions/WSUD` | Request a copy of the WSUD |

## Machine-readable artifacts (26)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/nacha/refs/heads/main/openapi/nacha-written-statement-of-unauthorized-debit-wsud-api-openapi.yml
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Payment/1.0.7
- **Documentation** — https://www.nacha.org/content/apis-development
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/IAR/1.0.1
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/IAR_Plus/1.0.1
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/transaction_status/1.0.14
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Wire_Payment_API/1.0.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Wire_Status_API/1.0.0
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Instant_Payment_API/1.0.6
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Instant_Payment_Transfer/1.0.1
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Payment_API/1.0.2
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/RET_API/1.0.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Authorize_To_Pay/1.0.6
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Pay_Me_API/1.0.11
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/account_validation/1.0.2
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Account_Validation_Plus_Ownership_API/1.1.0
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Account_Validation_Plus_Name_and_RET/1.0.4
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/RealTimeBillingAccountValidation/1.0.7
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Corporate_Account_Balances_API/1.0.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Corporate_Transaction_History_API/1.0.5
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Transaction_Detail_API/1.0.4
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Payee_Profile_API/2.1.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Written_Statement_of_Unauthorized_Debit/1.0.8
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Proof_of_Authorization/1.0.6
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/bank_contacts/1.0.5
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Bank_Contact_V2/1.0.9

## Other Nacha APIs (12)

- [Nacha Account Validation API](https://apis.io/apis/nacha/nacha-account-validation-api/)
- [Nacha Accounts API](https://apis.io/apis/nacha/nacha-accounts-api/)
- [Nacha ACH Payments API](https://apis.io/apis/nacha/nacha-ach-payments-api/)
- [Nacha ACH Transaction Status API](https://apis.io/apis/nacha/nacha-ach-transaction-status-api/)
- [Nacha Authorize to Pay API](https://apis.io/apis/nacha/nacha-authorize-to-pay-api/)
- [Nacha Banks API](https://apis.io/apis/nacha/nacha-banks-api/)
- [Nacha Expand Bank Contact V2 API](https://apis.io/apis/nacha/nacha-expand-bank-contact-v2-api/)
- [Nacha Get Corporate Account Balances API](https://apis.io/apis/nacha/nacha-get-corporate-account-balances-api/)
- [Nacha Get Corporate Transaction History API](https://apis.io/apis/nacha/nacha-get-corporate-transaction-history-api/)
- [Nacha Get Participants Profile API](https://apis.io/apis/nacha/nacha-get-participants-profile-api/)
- [Nacha Initiate Payment API](https://apis.io/apis/nacha/nacha-initiate-payment-api/)
- [Nacha Instant Payment API](https://apis.io/apis/nacha/nacha-instant-payment-api/)

## Tags

Written Statement of Unauthorized Debit (WSUD)

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/nacha/nacha-written-statement-of-unauthorized-debit-wsud-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/nacha/.