If your order failed and you got an error saying Address Verification Mismatch, the billing address provided in your Name.com account does not match what your bank or credit card provider has listed on file. Please make sure that you have entered your address correctly, especially the zip code. You may need to verify the address you have on file with your bank or credit card provider.
If the issue persists, you may need to verify the address you have on file with your financial institution or use a different payment method.
Note: Here is an article on how to verify and update your account information for your Name.com account.