# Reasonable errors on server-side analysis

Source: https://developer.avalara.com/products/communications/integration-guides/communications-integration/znt4486453409175/

Guide: Communications

# Reasonable errors on server-side analysis

**Element type:** Required

**Endpoints/models used:**N/A

Now that you understand error handling in AFC, a requirement is that your implementation should not include messages, including errors, warnings, and so on, except those that would result from normal (but invalid) user input (for example, invalid PCode data). These messages must be logged/displayed appropriately in the application.