# How does spam detection happen on the Truecaller app? Truecaller spam lists are created by our user community which chooses to report unsolicited calls and SMS messages. By enabling the creation of a spam directory it helps our users to avoid: * Fraud or criminal activity * Abusive or obscene calls * Crank calls * Unsolicited telemarketing calls * Robocalls * Phone spam * Scams (like pyramid schemes, tech-support scams, impersonation of financial institutions) We collect voluntary spam reports from our users to help protect the community from fraud, crime, abuse, and unwanted calls or messages. When someone blocks a number, they can also suggest a name for the caller or sender. Over time, if a number is repeatedly reported as spam by multiple users, we flag it accordingly. This allows us to alert others when they receive potentially harmful or unsolicited calls or messages. Apart from blocking and marking numbers as spam, Truecaller also allows users to inform us if the activity associated with a number is not spam. Our algorithms also factor in these positive feedbacks while evaluating if a number needs to be shown as spam/not spam to the rest of the Truecaller user base. Click here to know more about [Truecaller's Spam and Call Blocking Feature](https://www.truecaller.com/spam-blocking?utm_source=WebMain\&utm_medium=Footer). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.truecaller.com/truecaller-for-business/spam-management/how-does-spam-detection-happen-on-the-truecaller-app.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.