The Number Validation Workflow Trigger allows you to build a workflow that will be triggered in the event of a validation error occurring with your use of number validation services. This trigger runs based on the number validation response before sending an SMS or making a call. The contact with whom the communication caused an error will be added to this workflow, allowing you to sequence various actions toward the contact as well as internally. This article will give an overview of how to create a workflow using the Number Validation Workflow Trigger.



We have multiple articles available to explain the setup of each of the Workflow Actions. Feel free to review our articles on these for more information on setting these up.
Pro Tip: You can use any Workflow Actions to be triggered by the Number Validation trigger, or you can leave this workflow without any actions.

For an in-depth overview of Workflow Testing see our article, “Using the Testing Features in Workflows.”
Now your workflow is set up and ready to go with the Number Validation Workflow Trigger.
Question: What types of number validation errors can trigger the workflow?**
**Answer: You can choose between the following error types to trigger the workflow:
Question: Can I filter which contacts are added to the workflow?**
**Answer: Yes, you can use the Custom Fields filter to add only contacts that meet specific criteria to the workflow. These custom values must be set up elsewhere in your account.
Question: Do I need to add Workflow Actions for the trigger to work?**
**Answer: No, you can leave the workflow without any actions. However, adding actions like notifications or follow-up tasks can enhance the workflow’s effectiveness.
Question: How do I ensure my workflow is working correctly?**
**Answer: After saving and publishing your workflow, use the Test Workflow feature to confirm it is functioning as intended. For detailed instructions, refer to the article “Using the Testing Features in Workflows.”
Question: What happens if no contacts meet the trigger conditions?**
**Answer: If no contacts match the selected filters or validation errors, the workflow will not run for any contacts until a matching case occurs
Question: If a contact provides a new, valid number later, will they stay in this workflow?
Answer: Once a contact completes the actions in your Number Validation workflow, they exit. If they update their number and it fails validation again during a future automation, they will be re-added to the workflow to be processed again.
Question: Is it possible to trigger a workflow for both “SMS Incapable” and “Not Valid” numbers at once?
Answer: Yes. In the “Error” filter parameter, you have the flexibility to select one specific error type or choose both to ensure the workflow catches all validation failures.