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Braintree's elaborate AVS and CVV settings allow you to reject transactions that do not meet your fraud filter criteria. You can access AVS settings via Settings » Processing » Basic Credit Card Fraud Tools » AVS and » CVV on your Braintree dashboard.
Note: Remember to make sure your settings on Chargebee's field configuration page match the settings you choose here.
If you are using the V2 checkout pages, navigate to Settings » Customer-facing essentials » Checkout and Self-Serve Portal » Field Configurations (on the left panel) » Card Information to choose what information would like to mark as mandatory.
On the other hand, if your site has V3 checkout pages, navigate to Settings » Customer-facing essentials » Checkout and Self-Serve Portal » Fields » Payments (on the left panel). Here you can enable the fields and set them as mandatory by clicking on the edit icon. Screenshot for your reference.
If a transaction fails to meet the configured AVS criteria, it is declined at Braintree before processing - this is called a gateway rejection. AVS gateway rejections are accompanied by error codes and responses that reflect which filter was tripped, find a list of them here.
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