WhatsApp is testing prompts that flag suspicious messages and unfamiliar numbers before users reply.
WhatsApp is testing two separate anti-scam prompts that intervene before a risky conversation goes further: one flags suspicious incoming messages from unknown contacts, and another warns users before they open or start a chat with an unfamiliar phone number. Both are advisory checks, not automatic blocks. The unfamiliar-number prompt can show the number’s country code or registration country, whether it is saved in your contacts, and whether the two accounts share any WhatsApp groups.
Two anti-scam prompts now sit before the reply
The first prompt appears inside a chat when an incoming message from an unknown contact looks suspicious. The second appears earlier, before a user opens or starts a conversation with a number that is not already familiar. That distinction matters for anyone handling inbound leads or messages from new customers, because one warning comes after contact has started and the other arrives before the first reply.
In both cases, WhatsApp gives users a choice. They can continue, trust the chat, cancel, block, or report, depending on the prompt. Nothing is auto-blocked by default. That leaves the final decision with the user, which is a different model from a hard spam filter that simply removes access.
The pre-chat warning shows the clues WhatsApp can see
The unfamiliar-number warning is built around context, not a yes-or-no fraud label. Before a chat opens, WhatsApp can surface the number’s country code or registration country, whether the number is saved in contacts, and whether the two parties share any WhatsApp groups. Those clues are meant to help a user judge whether the number is likely legitimate before replying.
The feature is also explicit about its limits. It is not a definitive fraud detector, and it may miss some risky contacts. For business users, that means the warning is best treated as a checkpoint, not a verdict. If a supplier, lead, or customer reaches out from a new number, the prompt gives one more moment to slow down before sharing information or moving the conversation forward.
On-device checks, manual settings, and rollout limits
The incoming-message scam check is designed to run on-device. That matters because the message contents do not need to be read on WhatsApp’s servers, and end-to-end encryption stays intact. In practical terms, the detection happens locally on the phone, rather than by sending chat content out for analysis.
The scam-alert feature is still described as something users have to enable manually in settings. That makes it a closer fit for people who want an added layer of screening rather than a silent default. It also suggests the rollout is still uneven: one version of the warning has been tied to Android-first development, while the unfamiliar-number prompt is described as reaching Android and iOS.
For now, the most useful takeaway is simple. WhatsApp is pushing its anti-scam checks earlier in the conversation, but the tools are still advisory. They can help users pause before trusting an unknown number, yet they will not catch every scam or impersonation attempt.
Disclaimer: This article was created with the assistance of AI. Images are for illustrative purposes only.
About the author
Samarth Agrawal is an AI and technology professional who writes about WhatsApp, automation, and emerging AI trends. He focuses on simplifying complex tech updates into practical insights for businesses, creators, and everyday users
