Filter fraudulent leads with GPT-4o-mini, AbstractAPI, Google Sheets and Slack

This n8n template serves as a security layer for your marketing efforts, ensuring that only high-quality, human-verified leads reach your CRM while automatically blacklisting bots and VPN-based submissions.

How it works Lead Intake: The workflow triggers via a Webhook (e.g., from Tally.so or other form builders) when a new lead is submitted.

Dual-Layer Analysis: - IP Intelligence: It queries AbstractAPI to check the lead's IP address for red flags like VPNs, proxies, or data centre origins. - AI Intent Analysis: Simultaneously, it sends the name and message to GPT-4o-mini to analyse the content for non-human patterns, gibberish, or spam scripts. - Smart Filtering: A Merge node combines these data points, and an If Node applies "OR" logic: if the IP is a VPN/Proxy OR the AI detects spam, the lead is flagged.

Automated Action: - Verified Leads: Legitimate submissions are saved to a "Verified" Google Sheet for sales follow-up. - Fraud Prevention: Flagged leads are moved to a "Potential Spam" sheet. This list can be synced as an exclusion audience in Google or Meta Ads to prevent wasting budget on retargeting bots.

Instant Alerts: The team is notified immediately via Slack whenever a fraudulent submission is neutralized.

Requirements - OpenAI API Key: For lead content analysis. - AbstractAPI Key: For IP intelligence & security flags. - Google Sheets: To store verified and blacklisted lead data. - Slack: For real-time fraud alerts.

Customising this workflow - Field Mapping: If your form uses different labels (e.g., "Comments" instead of "Message"), update the expressions in the Message model and Google Sheets nodes. - Exclusion Logic: You can tighten the filter by adding more conditions to the If Node, such as specific country blocking or email domain validation.