---
title: "CustomerValidationError"
description: "Details of a customer validation error."
image: "https://developer.sumup.com/og/index.png"
---

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Path: SumUp REST API

Details of a customer validation error.

## Fields

- `instance` (`CustomerValidationError.instance`; string, required) — Unique identifier of this error occurrence.
  - example `"32a44c6c-85d3-49e8-86bf-a5bba98c4621"`
- `error_code` (`CustomerValidationError.error_code`; string, required) — Platform code for the error.
  - example `"INVALID"`
- `error_message` (`CustomerValidationError.error_message`; string, required) — Short description of the error.
  - example `"customer_id"`


Source: https://developer.sumup.com/api/schemas/CustomerValidationError/index.md