# API Support

## Can I upgrade a Receive Only Customer to a Verified Customer Record?
[Link](https://support.dwolla.com/s/article/Can-I-upgrade-a-Receive-Only-Customer-to-a-Verified-Customer-Record)

## How many verification documents can a user upload at a time?
[Link](https://support.dwolla.com/s/article/How-many-verification-documents-can-a-user-upload-at-a-time)

## Can I upgrade an Unverified Customer Record to a Verified Customer Record?
[Link](https://support.dwolla.com/s/article/Can-I-upgrade-an-Unverified-Customer-Record-to-a-Verified-Customer-Record)

## How do I programmatically refresh an API access token?
[Link](https://support.dwolla.com/s/article/How-do-I-programmatically-refresh-an-API-access-token)

## How to view webhooks and webhook subscriptions in the Dwolla Dashboard.
[Link](https://support.dwolla.com/s/article/How-to-view-webhooks-and-webhook-subscriptions-in-the-Dwolla-Dashboard)

## Are webhooks delivered in order?
[Link](https://support.dwolla.com/s/article/Are-webhooks-delivered-in-order)

## Is there an endpoint or call to mass-cancel transactions?
[Link](https://support.dwolla.com/s/article/Is-there-an-endpoint-or-call-to-mass-cancel-transactions)

## What API rate limits exist for Dwolla’s Sandbox and Production environments?
[Link](https://support.dwolla.com/s/article/What-API-rate-limits-exist-for-Dwolla-s-Sandbox-and-Production-environments)

## Why am I receiving a 403 Forbidden error when trying to create a Customer?
[Link](https://support.dwolla.com/s/article/Why-am-I-receiving-a-403-Forbidden-error-when-trying-to-create-a-Customer)

## How do I rotate or revoke my Dwolla API key and secret?
[Link](https://support.dwolla.com/s/article/How-do-I-rotate-or-revoke-my-Dwolla-API-key-and-secret)