Address Guard

Wonderful and robust app. Even if you're on Shopify Basic Plan it can be immensely useful, allowing you to create powerful rules.
A very clever thing is that in your Shopify Admin➔Checkout➔Checkout rules, only one rule is shown that includes all the rules created with this app. I would like to thank Ryan, who was kind and helpful.

Installed the app for address block and it really does its job. I see more potential and happy to dig further.
Highly recommended!

An excellent app and excellent support, always solving problems and always available!

An amazing app that's been invaluable since we downloaded it. Exceptional customer service and amazing offering that's the perfect fit for our store. As a gifting business we frequently saw address errors (street number missing) and incorrect delivery addresses where customers inadvertently send their order to themselves instead of the intended recipient, this app offers a solution to both and it works amazingly well - even with an express checkout. Ryan and his team offers speedy execution for new ideas, and a seamless design for customers that doesn't hinder the checkout experience. I strongly recommend you give this app a try.

The Address Guard team has been super responsive and helpful during the implementation process. They even helped build us a couple custom tools which was very helpful! So far so good and happy to have chosen them!