Magento 2.3 - How to verify US zip code with region in checkout and my account address

Question

I want to verify if the zip code entered by the customer matches correctly with the region.

For example:

zip code:10001

Region: New york

If the customer enters the wrong zip code for the region, it throws an error "your zipcode and region need to match"

I think I need to use the USPS API.

I created an account in USPS API.

How to implement this functionality in the checkout page and my account save address page.

I followed this below link. But It doesn't work for me.

Any help, experience and knowledge sharing would be appreciated

This is module is not good for your requirement
– Amit Bera ♦
Jul 25, 2019 at 18:52 — Amit Bera, Jul 25, 2019 at 18:52

Amit Bera · Accepted Answer · 2019-07-25 19:09:23Z

2

You have put the postcode/Region checking at

\Magento\Quote\Model\ShippingMethodManagement::estimateByExtendedAddress \Magento\Quote\Model\ShippingMethodManagement::estimateByAddressId

because of these functions, the shipping methods are rendered at the checkout page.

Note that, Magento 2 does not save the Shipping address till database 's quote until select the Shipping method .

So, the above two methods is best way to checking ZipCode/region at checkout.

answered Jul 25, 2019 at 19:09

Amit Bera♦

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It is working fine.
– Arunprabakaran M
Jul 29, 2019 at 11:54
How to show pop error message and stop to redirect to checkout page from cart page
– Arunprabakaran M
Jul 29, 2019 at 11:55
If you want to show this message at pop then you have work more and logic will different from current.
– Amit Bera ♦
Jul 29, 2019 at 11:58

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