📑WhatsApp Marketing5 min read• Updated September 2026

Message Templates & The 24-Hour Customer Service Window

Master Meta's Highly Structured Message (HSM) template approval process, 24-hour service session rules, and direct wholesale billing.

Message Templates & The 24-Hour Customer Service Window

Meta enforces specific messaging policies to prevent spam and ensure high engagement on WhatsApp. Understanding how Message Templates and the 24-Hour Customer Service Window work is essential for successful marketing broadcasts and live agent support.


1. The 24-Hour Customer Service Window

When an end-user sends a message to your business WhatsApp number:

  • A 24-Hour Customer Service Session opens immediately.
  • During this 24-hour window, your team can send free-form text, images, voice notes, PDFs, and links to the customer.
  • No template pre-approval is required for messages sent inside the window.
  • Replies inside the 24-hour window incur zero Meta delivery fees.

What Happens When the 24h Window Closes?

Once 24 hours have elapsed without a reply from the customer, you cannot send free-form text messages. To re-engage the customer, you must use a Meta-Approved Message Template.


2. Meta-Approved Message Templates (HSM)

Message Templates are pre-approved message formats required whenever:

  1. You initiate an outbound conversation with a contact who hasn't messaged you recently.
  2. You run a scheduled bulk broadcast or automated follow-up sequence.
  3. You follow up with a lead after their 24-hour customer service session has expired.

Template Categories

  • MARKETING: Promotional offers, product updates, newsletters, discount codes, and abandoned cart reminders.
  • UTILITY: Order confirmations, appointment reminders, shipping tracking, billing notifications.
  • AUTHENTICATION: One-time passwords (OTP) and two-factor verification codes.

Variable Parameters

Templates support dynamic parameters like {{1}}, {{2}}. For example:

*"Hi {{1}}, your order #{{2}} has been confirmed and will ship within 24 hours."*

When launching a broadcast or sending a direct message in MANZA, our template engine automatically populates {{1}} with the contact's name and other CRM custom variables.


3. Creating Templates Inside MANZA

  1. Go to WhatsApp Hub > Message Templates (/app/whatsapp/templates).
  2. Click "+ Create New Template".
  3. Configure:
  4. Template Name: Alphanumeric and underscores only (e.g., lead_followup_offer).
  5. Category: MARKETING or UTILITY.
  6. Body Text: Type your message and use the variable inserter for dynamic tags.
  7. Buttons: Optional Quick Reply buttons or Call-to-Action URLs.
  8. Click "Submit to Meta for Approval". Meta typically reviews and approves templates within 2 to 15 minutes.

4. Wholesale Pass-Through Billing (Zero Markup)

Unlike traditional Business Solution Providers (Wati, Interakt, AiSensy) who charge ₹1.10–₹1.35 per message with wallet locks, MANZA connects directly to your Meta Cloud API account:

  • Meta bills your linked payment card directly at wholesale rates (~₹0.86/marketing message in India).
  • MANZA charges a 0% message markup.
  • Free customer service replies inside the 24h window remain 100% free.

Have questions about this integration?

Configure this feature in your MANZA workspace or message our team for guidance.