Address validators for online checkout are notoriously inaccurate, though they still help a lot. You just have to prompt the user, "Did you mean 123 Example St?

Address validators for online checkout are notoriously inaccurate, though they still help a lot. You just have to prompt the user, "Did you mean 123 Example St?" I'd probably do the same for poorly formatted URLs. When the user hits Submit, a prompt appears saying, "Did you mean `https://example.com https://example.com`?"