Checkout and authentication
Email or Phone at Shopify Checkout: Keep the Customer Reachable
Choose Shopify checkout contact requirements around how your team resolves order problems and what your delivery services genuinely need. Email and phone serve different operational purposes. The aim is to collect a usable route for purchase updates without assuming that more mandatory fields automatically produce better information.
Start with the workflows that depend on contact: order clarification, shipping updates, delivery exceptions, and support replies. Then identify which field supplies each workflow. The checkout contact method and a shipping-address phone number are separate choices and should be evaluated separately.
Map contact needs to fields
Shopify's checkout-form documentation describes the email-or-phone and email contact choices, with shipping phone configured separately. Verify the current options and exceptions for the store's checkout rather than assuming both contact methods can be required through one setting.
Create a field-purpose map:
| Operational need | Information needed | Verification question |
|---|---|---|
| Order updates | Supported customer contact route | Does the expected notification reach the chosen route? |
| Detailed support conversation | A channel the team can use reliably | Can the customer reply or find support easily? |
| Carrier contact | Phone if required for the selected service | Is it collected in the field the carrier receives? |
| Delivery correction | Reachable order contact | Can staff locate it without searching unrelated systems? |
| Account sign-in | Requirements of the chosen account model | Does the contact choice fit the sign-in flow? |
Do not treat the same field as interchangeable across all systems. A number stored in a customer profile may not be the number a fulfillment integration sends to the carrier. Verify the actual mapping.
Balance necessity with customer effort
Require a field when it has a clear operational purpose or is required by the relevant service. If a carrier needs a phone number, making the shipping phone optional can leave staff chasing it after purchase. If the store never uses a field, making it mandatory can add friction without creating a practical benefit.
A required field also does not guarantee accuracy. Customers can mistype or enter information that passes basic formatting but is not usable. Design the field label and explanation so the customer understands why the information is requested.
Keep transaction contact separate from marketing consent. A buyer providing a number to resolve delivery problems is not a reason for staff to treat it as permission for unrelated campaigns. This article concerns order operations; the store's consent process should remain distinct.
Test the complete handoff
Use representative checkout paths: standard checkout, mobile, accelerated checkout where offered, and the account-sign-in flow if required. Confirm what the customer must enter and what the merchant, notification system, and fulfillment partner actually receive.
Shopify's notification guidance is a reference for the supported order communications. A field being saved is not proof that the intended update reaches the customer or that replies enter a monitored queue.
For each path, record the selected contact method, shipping-phone behavior, saved fields, notification outcome, and carrier mapping. Use approved test methods and non-sensitive test data. Do not send test messages to unrelated real customers.
Pay attention to the phone-only path if the store allows it. Can support conduct the required conversation through the available channel? Are customers told where to find detailed order information? A workflow built entirely around email may not work simply because checkout also accepts a phone number.
A hypothetical carrier-contact problem
A hypothetical store offers a delivery service that needs a recipient phone number. Checkout permits email as the customer contact method, but the shipping-phone field is optional. Operations repeatedly discovers that the carrier record lacks the information required to arrange delivery.
The team verifies the service requirement and the integration mapping, then changes the relevant shipping-phone requirement through the supported setting. It explains the field's delivery purpose and tests that the number reaches the carrier workflow.
The solution is not to replace email indiscriminately or to make every customer field mandatory. It is to collect the specific information the selected service needs in the field that supplies it. All details in the example are invented to demonstrate that mapping.
Assign ownership for contact quality
Give the ecommerce owner responsibility for checkout field configuration, support responsibility for reachable order conversations, and operations responsibility for carrier data requirements. A shared problem needs clear boundaries so a failed delivery call does not become an unresolved argument about who collected the number.
When a live order contains bad details, route it to the existing-order correction process. Do not silently change checkout settings as a response to one typo without examining the broader cause.
The final decision should state which contact options customers have, when a shipping phone is required, which routes were tested, and who handles failures. A reachable customer is an operational outcome supported by clear fields, accurate mappings, and monitored channels—not merely by a checkout form containing more boxes.
See the order and dispute information available in Lower Chargeback.
Related reading in this collection:
- Test Your Shopify Checkout for Dispute-Causing Surprises
- Prevent Duplicate Shopify Charges When a Customer Retries Checkout
- A Support Reply Is Not a Resolution: Set Shopify Customer-Service Commitments