# Common SDK and API errors

Source: https://developer.avalara.com/products/ecm/integration-guides/document-management/oys5098990353833/

Guide: Exemption Certificate Management (ECM)

# Common SDK and API errors

Understand common errors encountered with SDK initialization and API usage, and how to address them.

## Error on SDK initialization

`You do not have exposures to exempt at this time.`

Check the spelling of the `ship_zone` field being passed. Also, check the nexus settings. SDK will return this response when the `ship_zone` isn’t in the nexus for that company in ECM.

## Upload and delete certificate PDFs using the API

Loading and deleting certificates through an API POST isn’t recommended because the certificate must be validated or created through the controlled settings within the ecommerce interaction. Use the built-in functionality of the ecommerce plugin instead of passing PDFs through the API.