Shopify allows you to collect separate consent for WhatsApp marketing at checkout. The phone number used to deliver an order does not, on its own, constitute permission to send promotions.
Source: official announcement.
What to check first
Read exactly the text the customer sees, then place two test orders: one with WhatsApp consent and one without. Verify both statuses in the customer profile, the date stamp proof, and the ability to unsubscribe. Also, ensure this consent is separate from email consent.
A practical case
Fictional example: a customer accepts WhatsApp but declines emails. Their profile must maintain these two different choices; the team must not add them to the email list simply for convenience. Prepare a welcome message limited to the accepted channel.
How to measure the result
Before a campaign, check the regulations of the country being served and your method for removing contacts from the list. Track unsubscribes and useful responses, not just the number of collected phone numbers.
