The short answer: treat a promotional WhatsApp like a promotional SMS. Consent or a DNC check first, sender identification and an opt-out in every message, and records a compliance lead can audit.
App broadcast lists vs Platform marketing messages
A broadcast list in the WhatsApp Business app sends one message to many contacts as separate chats. It suits a small shop. Companies sending to large audiences use marketing template messages on the WhatsApp Business Platform: templates approved by Meta, sent to customers who opted in, with delivery and read reporting for every send.
Either way, the compliance question is the same: is this message allowed to go to this number?
The Do Not Call Provisions and WhatsApp
Singapore's PDPA includes Do Not Call (DNC) Provisions for marketing messages, called specified messages, sent to Singapore telephone numbers. PDPC treats marketing messages sent to a Singapore number through instant messaging services such as WhatsApp as text messages for the purposes of these provisions.
Before sending a specified message, check the number against the DNC Registry unless you have the person's clear and unambiguous consent in written or other accessible form. A Registry check result is valid for 30 days, so repeat checks before each campaign.
The ongoing-relationship exclusion
The provisions also exclude messages sent in the course of an ongoing relationship with the person that relate to the subject of that relationship; check the exact conditions in PDPC's guidelines before relying on it.
Every specified message must also identify the sender and give contact details, and must not conceal the calling number. Our PDPA DNC checker walks a message through these rules, and DNC rules for lead follow-up covers the sales side.
What a compliance lead will ask for
- Consent records: how and when each number opted in, and to what.
- DNC checks: dates of the last Registry check for numbers without consent.
- Opt-outs: how a stop request reaches every sending system, and how fast.
- Templates: the approved wording for each campaign, with sender identification.
Keep marketing lists separate from service contacts, so an opt-out from promotions does not stop appointment reminders or order updates.
Healthcare senders: the content rules still apply
For clinics and healthcare groups, a WhatsApp promotion is also an advertisement under the Healthcare Services (Advertisement) Regulations. Passing the DNC check does not make the content compliant. See healthcare social media marketing in Singapore for what the content may say.
Proof: B9 Dental Centre
For B9 Dental Centre, a multi-location dental group operating under CHAS and Healthier SG, we run Meta Ads into a WhatsApp booking funnel where enquiries are answered and confirmed in chat. Post-funnel-optimisation period; cost per qualified lead compares the first 90 days with the baseline:
| Metric | Before | After |
|---|---|---|
| Cost per qualified lead (high-value treatments) | SGD 65 | SGD 38 (−42%) |
| Lead-to-confirmed-appointment rate (WhatsApp) | — | 82% |
| Qualified patient leads | — | 3,100+ |
Full detail: B9 Dental Centre Meta Ads case study.
How we set it up for multi-outlet teams
Platform numbers and approved templates; opt-in capture on every entry point; DNC checks scheduled for numbers without consent; replies routed to the right outlet; opt-outs synced to every system; and monthly reporting on replies, bookings and opt-out rate. See the WhatsApp automation service in Singapore.
Ready to grow your business with proven digital marketing?
Our team specialises in performance marketing built for the Singapore market — SGD budgeting, MOH/PDPA-aware compliance, and campaigns run for Singapore accounts, not copied from Malaysia.
Published by shakalakaa team · Editorial standards