AVS Error - Sage
If you have been seeing declined transactions with AVS Error messages, you can watch this video to see how to edit your gateway settings to prevent this from happening.
Chances are, there is a setting in place that is requiring the address on their credit card statement to EXACTLY match the address they type in your form(s). For instance, if their credit card statement says 123 Main Street, but they type 123 Main St. it will cause this error. You can watch this video to edit those settings to allow them to enter a variation of Street, St, etc and have it be approved.