Validate QR tickets in real time with Google Forms and Sheets

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1. Workflow Overview

Automated QR Ticket Scanner & Validator This workflow is the perfect companion to the "Automated e Ticket PDF Generator". It acts as a lightweight, automated check in system for events. By pairing ...

Best for

Miscellaneous automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.googlesheetstrigger, n8n-nodes-base.googlesheets, n8n-nodes-base.switch, n8n-nodes-base.set, n8n-nodes-base.code

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Scale On Fajar.

Original n8n.io source

1.1 Workflow description

Title: Validate QR tickets in real time with Google Forms and Sheets
Workflow name: Validate QR tickets in real time with Google Forms and Sheets

Automated QR Ticket Scanner & Validator

This workflow is the perfect companion to the "Automated e-Ticket PDF Generator". It acts as a lightweight, automated check-in system for events. By pairing a simple Google Form with a mobile scanning app, it validates QR codes against your master database in real-time and logs the attendance status.

How it works

Trigger: The workflow triggers instantly when a new response is submitted to a Google Form (which acts as your QR code scanner input).
Data Extraction: It isolates the scanned QR code string from the new Google Sheet row.
Database Lookup: It cross-references the scanned code with your Master Participant Database in Google Sheets.
Validation (Switch): A logic node checks if the scanned ticket exists and matches the database.
Log Results: - VALID: If matched, it logs the participant's details into a "Scan Results" sheet with a "VALID" status.

INVALID: If not matched, it logs the scanned code with an "INVALID" status, alerting you to an unregistered ticket.

Field Setup (Pro-Tip)

To make this work seamlessly at an actual event venue:

Create a Google Form: Make a simple form with one short-answer text input for the QR code.
Use "Scan to Web" App: Install the Scan to Web app (or a similar keyboard scanner app) on an Android smartphone.
Scan Away: Open your Google Form link on the phone, tap the text input field, and use the app to scan the attendee's physical or digital QR code. The app will automatically type the code and submit the form, triggering this n8n workflow instantly!

Requirements

A Google Workspace account (Google Forms & Google Sheets).
A basic understanding of mapping Google Sheets columns in n8n.
An Android smartphone with the "Scan to Web" app installed for field scanning.

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 - Sticky Note

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

Block 2 - Sticky Note1

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

Block 3 - Sticky Note2

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

Block 4 - Sticky Note3

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

Block 5 - Sticky Note4

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

Block 6 - Sheets Update Trigger

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

Block 7 - Read Trigger Sheet Rows

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 8 - Append Scan Results

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 9 - Append to Scan Results Sheet

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 10 - Route by Conditional Rules

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3.2

Block 11 - Set Ticket Code Field

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 12 - Select Latest Item

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

Block 13 - Read Form Responses Sheet

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 14 - Select Latest Form Response

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

3. Summary Table

Workflow	Validate QR tickets in real time with Google Forms and Sheets
Complexity	intermediate
Nodes	14
Categories	Miscellaneous
Author	Scale On Fajar
Published	29 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14431/14431.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 Miscellaneous workflows

Frequently asked questions

What does Validate QR tickets in real time with Google Forms and Sheets 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 Miscellaneous use case.

Scale On Fajar

2 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.googlesheetstrigger n8n-nodes-base.googlesheets n8n-nodes-base.switch n8n-nodes-base.set n8n-nodes-base.code

Complexity

intermediate

Published 29 Mar 2026

Likes 0

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Install path: /data/workflows/14431/14431.json

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Validate QR tickets in real time with Google Forms and Sheets

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Automated QR Ticket Scanner & Validator

How it works

Field Setup (Pro-Tip)

Requirements

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Sticky Note2

Block 4 - Sticky Note3

Block 5 - Sticky Note4

Block 6 - Sheets Update Trigger

Block 7 - Read Trigger Sheet Rows

Block 8 - Append Scan Results

Block 9 - Append to Scan Results Sheet

Block 10 - Route by Conditional Rules

Block 11 - Set Ticket Code Field

Block 12 - Select Latest Item

Block 13 - Read Form Responses Sheet

Block 14 - Select Latest Form Response

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