How does Address Ninja handle addresses with missing or non-standard postal codes?

Address Ninja does not have custom postal code rules. Validate postal code format checks the postal code against the built-in format for the shipping country, such as 12345 for the United States, K1A 0A6 for Canada, or SW1A 1AA for the United Kingdom. The whole field must match the format. The formats cannot be edited.

Countries with no postal code format are not checked. An empty postal code field is not checked. If the real codes of a country do not match the built-in format, add that country under Except these countries in the Countries card so its postal codes are not checked.