# Why is my customer's shipping address invalid? (Phone number formatting)

Last updated: May 14, 2025

As of 2023, Shopify [has changed the requirements](https://shopify.dev/docs/api/admin-rest/2022-07/resources/customer#post-customers) for what format a phone number must be in for a customer's shipping address. 

<figure><img src="https://3658670565-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FndNAuxS4koYyI8AQTpS9%2Fuploads%2FoAhdbKl7WnDJ6ObFPi3q%2FScreenshot%202023-02-16%20at%2015.02.42.png?alt=media&#x26;token=5c129d7f-45d9-4b34-8385-18088ea735aa" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
**Tip:** To check your store's Shopify settings on requiring a phone number for orders, navigate to **Settings** > **Checkout** and scroll to **Shipping address phone number**. We recommend this be set to either or **Don't include** or **Optional**. If set to Required, than all previously purchased customer subscriptions without a phone number will fail to process.&#x20;
{% endhint %}

<figure><img src="https://3658670565-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FndNAuxS4koYyI8AQTpS9%2Fuploads%2FgmLVZURjNlAjTh3Z4qg6%2Fshipping-address-phone-number.gif?alt=media&#x26;token=1165d9e8-5bf8-4ff2-915c-b3bcc6aed3ff" alt=""><figcaption></figcaption></figure>

If your store has **Required** checked for customer shopping address phone number, the phone number must match one of the formats required by Shopify. For US-based phone numbers, (starting with +1), these formats include:&#x20;

* +1 ###-###-####
* (###)###-####
* +1##########
* \##########

For example:&#x20;

* +1 234-567-8901
* (234)567-8901
* +12346578901
* 2346578901

{% hint style="warning" %}
Do not use the + symbol without a country code (ex. +2346578901). Additionally, text input will not be accepted, so you can't write anything like "None" or "No phone number provided".&#x20;
{% endhint %}