We have a problem with un-validated/unverified addresses in our system. I'm looking for anyone who has set up and/or uses a service/integration for address validation/verification. For example, we're having lots of issues that we're dealing with (especially with online orders due to customer-supplied addresses) where city & state vs zip code don't match, and it's causing issues. We're on SiteBuilder. Does anyone have any options and/or opinions for me? Also, US and possibly canada, but mainly looking for a US system.

check out smarty streets

I don't have any api programming experience, sadly...