Abandoned cart on WhatsApp: one message, or none

WhatsApp cart recovery works better than email and damages more when it is wrong. The rule that keeps both true: only to people who opted in to marketing, once, and only when the cart is worth a personal message.

The consent problem, first

A number typed into a checkout that was never completed is a number you hold for the purpose of completing that order. It is not marketing consent, under either Meta's policy or most data protection law.

The fix is a checkbox at the point the number is entered, unticked, saying what you will send. What counts as opt-in covers the wording. Without it, cart recovery on WhatsApp is a campaign to strangers who were mid-purchase, which is exactly the traffic that produces blocks.

Why one and not four

What the one message should say

1. Name the item. Not "your cart" - the actual thing, ideally with the picture.
2. Answer the likely objection. Most abandoned carts are delivery cost, delivery time or payment doubt. Say the answer rather than repeating the offer.
3. Make replying the easy path. "Reply if you want it held" converts better than a link, because it starts a conversation you can actually help in.
4. Include the way out. One line, every time.

When not to send at all

• Low value carts. The conversation costs money and the goodwill costs more.
• Repeat abandoners. Somebody who has abandoned three times is browsing, not hesitating.
• Within the hour. They may still be deciding, on the same device, in another tab.
• Out of hours. A cart is never urgent enough to justify a phone lighting up at midnight.

Measure the right thing

Recovery rate is the easy number. Track blocks and opt-outs on the same segment alongside it - a campaign that recovers four percent of carts and loses two percent of your list is not a win, and only one of those two numbers appears in the dashboard by default.