How to collect WhatsApp opt-ins the right way (and keep your number healthy)

Before a business can send WhatsApp messages to a customer, WhatsApp's Business Messaging Policy requires that the customer opted in: they gave you their number and agreed to receive messages from you on WhatsApp.

Many businesses skip this, upload an old contact list and send a broadcast. The result is blocks, reports, a falling quality rating and sometimes a restricted number. Done properly, opt-ins are easy, and they also make your messages far more effective. This guide shows how.

What counts as a valid opt-in

According to WhatsApp's rules, an opt-in should:

• make clear that the person agrees to receive messages from your business on WhatsApp,
• state your business name,
• be given actively by the person (for example ticking a box, sending a message, tapping a button),
• comply with local laws.

You should also keep a record of when and how each contact opted in, and honour opt-out requests quickly.

Note the difference between opt-in and conversation. When a customer messages you first, you can reply within 24 hours. To send them messages later (reminders, updates, offers), you need their opt-in and approved templates.

Ways to collect opt-ins online

Website forms

Add a line or checkbox to contact, enquiry and booking forms:

☐ Send me updates on WhatsApp from Sunrise Dental. You can stop anytime.

Our guide on sending website form leads to WhatsApp shows how to connect forms so the lead gets a message instantly.

Checkout pages

For online stores, add WhatsApp consent at checkout for order updates and reminders. Make marketing consent a separate, optional choice.

Click-to-chat links and QR codes

When a customer messages you first through a link or QR code, ask in your welcome message whether they would like updates:

Would you like to receive offers and updates from us on WhatsApp? Yes, please / No, thanks

Save the answer on the contact. You can create a free link and QR code with our WhatsApp link generator.

Instagram and Facebook

Comment-to-DM campaigns and lead forms can include an opt-in step. See Instagram comment to DM automation.

Ways to collect opt-ins offline

• At the counter: a standee with a QR code: "Scan to get your bill and offers on WhatsApp".
• On receipts and packaging: "Scan to track your order on WhatsApp".
• At events and exhibitions: a QR code that starts a chat and asks for consent.
• Over the phone: ask, then send a confirmation message so the customer can reply to confirm.

Offline opt-ins work best when the customer sends the first message themselves (by scanning a QR), because that is a clear, recorded action.

Give people a reason to say yes

People opt in when they get something useful:

• order and delivery updates,
• appointment reminders,
• digital bills instead of paper,
• early access to sales,
• useful tips (care instructions, study material, recipes).

Tell them what they will get and how often.

Make opting out easy

Every marketing template should make it easy to stop, for example a Stop offers quick-reply button. When someone opts out:

• tag them and exclude them from marketing campaigns automatically,
• keep sending only messages they still need (like an order update they requested),
• never argue or ask why.

Easy opt-out protects your quality rating more than anything else.

Why this protects your number

WhatsApp tracks how recipients react to your messages. If many people block or report you, your quality rating drops, templates can be paused and your messaging limits can be reduced. Opted-in, interested contacts rarely block you. That is why opt-in is not just a rule; it is how your WhatsApp channel stays healthy and grows. More in how to send WhatsApp broadcasts without getting blocked.

Frequently asked questions

Can I message my old customer list?

Only contacts who agreed to receive WhatsApp messages from you. If you are unsure, invite old customers through another channel (SMS, email, in store) to message you on WhatsApp first, and ask for consent there.

Does a customer messaging me count as an opt-in?

It lets you reply within 24 hours. For messages after that, ask for opt-in explicitly in the chat and save the answer.

Do I need separate consent for marketing?

It is good practice to separate transactional updates from marketing, and to let people choose marketing separately.

How do I store proof of opt-in?

Store the date, source and wording for each contact's opt-in, for example as a tag or field on the contact.

How Click 2 WApp Omni helps

In Click 2 WApp Omni you can ask for consent in welcome flows and save the answer as a tag, and contacts who send an opt-out keyword are excluded from campaigns automatically. Start a 7-day free trial and build your list the right way.