Deduplicate lead data with Google Sheets: automated email alerts & log management

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Description: Keep your databases clean and reliable with this intelligent n8n workflow template! Effortlessly detect duplicate records, generate structured logs, and receive instant email updates—n...

Best for

Lead Generation automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.googlesheetstrigger, n8n-nodes-base.googlesheets, n8n-nodes-base.httprequest, n8n-nodes-base.filter, n8n-nodes-base.if, n8n-nodes-base.code, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Rahul Joshi.

Original n8n.io source

1.1 Workflow description

Title: Deduplicate lead data with Google Sheets: automated email alerts & log management
Workflow name: Deduplicate lead data with Google Sheets: automated email alerts & log management

Description:

Keep your databases clean and reliable with this intelligent n8n workflow template! Effortlessly detect duplicate records, generate structured logs, and receive instant email updates—no manual review needed.

This automation retrieves records from Google Sheets, runs a custom deduplication engine to detect duplicate entries (based on email and phone), saves detailed logs to Google Drive, and notifies your team via email. Perfect for businesses, analysts, and data teams who need to maintain clean datasets and ensure accuracy in customer or lead management systems.

What This Template Does:

📊 Fetches data from Google Sheets for duplicate analysis 🧠 Identifies duplicate entries using email + phone logic 📂 Generates detailed duplication logs and saves them in Google Drive 📧 Sends automated email notifications to your team with process details 🌟 100% automated: just run the workflow and get instant results

Built-in Logic Ensures:

✔️ Duplicate detection is accurate and structured ✔️ Logs are organized for easy access and auditing ✔️ Team members stay informed with timely notifications

Requirements:

Google Sheets containing your dataset
Google Drive account for log storage
SMTP/Gmail account for notifications
n8n instance (self-hosted or cloud)

Perfect For:

Data teams maintaining large customer or lead databases
Businesses ensuring accuracy in CRM records
Analysts and operations teams wanting hands-free duplicate management

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Google Sheets Trigger1

Type / Role: n8n-nodes-base.googleSheetsTrigger - googleSheetsTrigger
Config choices: Version 1

Block 2 - Lookup Lead1

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 3

Block 3 - Update Contact (GHL)1

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 4 - Log New Lead1

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 3

Block 5 - Log Duplicate Lead1

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 3

Block 6 - Create Contact (GHL)1

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 7 - Check the duplication

Type / Role: n8n-nodes-base.filter - filter
Config choices: Version 2.2

Block 8 - Check from the data base?1

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 9 - Code

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 10 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 13 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 14 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 15 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 16 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Sticky Note7

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 18 - Sticky Note8

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Deduplicate lead data with Google Sheets: automated email alerts & log management
Complexity	advanced
Nodes	18
Categories	Lead Generation
Author	Rahul Joshi
Published	05 Sept 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/8281/8281.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Lead Generation workflows

Frequently asked questions

What does Deduplicate lead data with Google Sheets: automated email alerts & log management do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Generation use case.

Rahul Joshi

269 workflows

Nodes

n8n-nodes-base.googlesheetstrigger n8n-nodes-base.googlesheets n8n-nodes-base.httprequest n8n-nodes-base.filter n8n-nodes-base.if n8n-nodes-base.code n8n-nodes-base.stickynote

Complexity

advanced

Published 05 Sept 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/8281/8281.json

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Deduplicate lead data with Google Sheets: automated email alerts & log management

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Google Sheets Trigger1

Block 2 - Lookup Lead1

Block 3 - Update Contact (GHL)1

Block 4 - Log New Lead1

Block 5 - Log Duplicate Lead1

Block 6 - Create Contact (GHL)1

Block 7 - Check the duplication

Block 8 - Check from the data base?1

Block 9 - Code

Block 10 - Sticky Note

Block 11 - Sticky Note1

Block 12 - Sticky Note2

Block 13 - Sticky Note3

Block 14 - Sticky Note4

Block 15 - Sticky Note5

Block 16 - Sticky Note6

Block 17 - Sticky Note7

Block 18 - Sticky Note8

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions