# Afinis Written Statement of Unauthorized Debit (WSUD) API

**Canonical:** https://apis.io/apis/nacha/nacha-wsud/  
**Provider:** Nacha — https://apis.io/providers/nacha/  
**Documentation:** https://app.swaggerhub.com/apis/ASIG/Written_Statement_of_Unauthorized_Debit/1.0.8

Afinis Written Statement of Unauthorized Debit (WSUD) API is one of 24 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 ACH, Disputes, and Unauthorized. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, and API documentation.

Afinis WSUD API letting an ODFI send an automated electronic request to an RDFI for a copy of a consumer's Written Statement of Unauthorized Debit.

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/nacha/refs/heads/main/openapi/nacha-wsud.json
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Written_Statement_of_Unauthorized_Debit/1.0.8
- **Documentation** — https://www.nacha.org/content/apis-development
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/nacha/refs/heads/main/overlays/nacha-wsud-overlay.yaml

## Other Nacha APIs (12)

- [Afinis Initiate ACH Payment API](https://apis.io/apis/nacha/nacha-initiate-payment/)
- [Afinis International ACH Remittance (IAR) API](https://apis.io/apis/nacha/nacha-iar/)
- [Afinis IAR Plus API](https://apis.io/apis/nacha/nacha-iar-plus/)
- [Afinis Transaction Status API](https://apis.io/apis/nacha/nacha-transaction-status/)
- [Afinis Initiate Wire Payment API](https://apis.io/apis/nacha/nacha-initiate-wire-payment/)
- [Afinis Get Wire Status API](https://apis.io/apis/nacha/nacha-get-wire-status/)
- [Afinis Initiate Instant Payment API (IIP)](https://apis.io/apis/nacha/nacha-initiate-instant-payment/)
- [Afinis Instant Payment Transfer API (IPT)](https://apis.io/apis/nacha/nacha-instant-payment-transfer/)
- [Afinis Initiate Payment API](https://apis.io/apis/nacha/nacha-initiate-payment-api/)
- [Afinis Reporting ACH Return (RET) API](https://apis.io/apis/nacha/nacha-ret/)
- [Afinis Authorize to Pay (Debit Authorizations) API](https://apis.io/apis/nacha/nacha-authorize-to-pay/)
- [Afinis Pay Me API](https://apis.io/apis/nacha/nacha-pay-me/)

## Tags

ACH, Disputes, Unauthorized

---

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