# Use the Validation Service

> Validation Service API usage in Document Understanding for Automation Suite, explaining how to create validation tasks in Action Center using the document ID with either a classifier ID or extractor ID.

Validate the data by using the `documentId` and the `classifierId` or the `extractorId`. By calling this API, a validation task is created in Action Center.

Each action requires one POST and multiple GET calls (due to polling), meaning that if you want to validate a classification result, then you need to do a POST and multiple GET calls. Same applies for validating an extraction result.

When a POST call is initiated you need to add the `classificationResults` / `extractionResults` previously received when calling the classifier/extractor in the Request body of the POST request.

:::note
Validation data is soft deleted after 30 days.
:::