Webhook behavior in Plaid’s Sandbox and Development environments will mimic behavior in Plaid’s Production environment. That is, creating an Item in either environment will trigger INITIAL_UPDATE and HISTORICAL_UPDATE webhooks; updating an Item webhook will trigger a WEBHOOK_UPDATE_ACKNOWLEDGED webhook; if a Development environment’s Item has a transaction that is removed, a TRANSACTIONS_REMOVED webhook will be triggered; and if an Item is in an error state, an ERROR webhook will be triggered.
