> For the complete documentation index, see [llms.txt](https://docs.sprinthub.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sprinthub.com/en/strategies/whatsapp/problems-with-whatsapp/blocks-and-bans-on-whatsapp-what-you-need-to-know.md). # Blocks and Bans on WhatsApp: What You Need to Know Yes, there is a real possibility that a number will be blocked or banned by WhatsApp — and that’s why it’s essential to follow best practices. We created this article to share everything we’ve learned over the years about how to reduce risks, avoid blocks, and keep your sends running safely. *** ## **Why is WhatsApp so strict about spam?** Think about your daily life: you probably receive dozens of promotional SMS messages, but almost no promotions via WhatsApp. That’s because WhatsApp was created for personal conversations, and any behavior similar to spam is quickly identified and punished. Also, you’ve probably seen it yourself: whenever a suspicious message arrives, the app offers options to **mark as spam** and **block the contact**. **In other words: WhatsApp does NOT allow spam — and takes that very seriously.** *** ## **Does quantity matter? Yes. But *****who***** you send to matters even more** Many people believe that blocking happens only because of the volume of messages sent. But the reality is different: 📌 **What matters most is the number of different recipients**, especially when there is no natural interaction or prior relationship. We have clients who send promotions to **more than 80,000 people per day**, without blocks. How? By following essential best practices, which we share below. *** ## **Essential Best Practices to Avoid Blocks** #### **1. Number warming** Use the number normally in the app before connecting it to Z-API. #### **2. Interact through the app or WhatsApp Web before automating** This reinforces to WhatsApp that the account is legitimate. #### **3. Encourage replies** Messages that generate interaction are less likely to be marked as spam. #### **4. Offer an opt-out option** Example:\ **“Type 2 to stop receiving these messages.”** #### **5. Complete the profile** Photo, name, and description increase credibility. #### **6. Read the QR Code 24 hours after registration** Helps with initial validation. *** ## **Recommended sending method (real case)** A client who sends to 80,000 contacts/day without blocks uses this method: #### **1. The recipient starts the contact** The person saves the number and sends “I want promotions.” #### **2. Personalization** Each message contains recipient data. #### **3. Opt-out always available** And automatically removed via webhooks. *** ## **Summary of Best Practices** * Avoid sending messages to people who **did not save your number**. * Personalize whenever possible. * Encourage replies. * Offer an unsubscribe option. * Respect opt-out webhooks. ⚠️ **Attention:**\ If **3% of recipients mark your message as spam**, the number may be banned. *** ## **Bans: What really influences them** After four years of testing WhatsApp Web and API, we identified that factors such as IP and ASN have minimal impact. ### **1. Periods of high moderation** Elections, crises, fake news → overall increase in bans. ### **2. Sensitive content** Words like “PIX”, “boleto”, “card” increase the risk. ### **3. New numbers sending to many contacts** One of the riskiest behaviors. ### **4. History of the recycled number** Reused numbers with a bad reputation are banned quickly. ### **5. Volume of unique recipients** This is the most critical factor. ### **6. Repetition of patterns across replacement numbers** Identical photos, names, and messages trigger detection mechanisms. #### **How to reduce the risk** * Change the photo, name, and description. * Change the initial sending pattern. * Avoid repeating the behavior of the previous number. *** ## **What the tests show** * We have already seen numbers get banned **just by connecting the QR Code**. * In other cases, the block happened after **10 messages to different contacts**. * Some segments suffer more impact, especially financial areas and cold lists. *** ## **Conclusion** The WhatsApp algorithm changes constantly. Today, the two most important factors are: #### **1. Number of different recipients** The more unique contacts → the higher the risk. #### **2. Message content** Keywords, sending pattern, and lack of interaction increase the risk. Factors like IP, device, or type of integration carry less weight. The safest approach is **monitor continuously, adjust constantly, and maintain healthy sending practices**. *** ## **Official References – Z-API** For further reading, also see: 🔗 **Blocks and Bans**\ 🔗 **Blocks and Bans (2025)**\