Generate Personalized Promo Cards with Email Verification, Gmail & Google Sheets

Personalized Promo Code Cards for Verified Users

Overview This workflow automatically generates beautiful, personalized promotional cards with QR codes and sends them via email to verified users. Perfect for e-commerce stores, marketing campaigns, and customer engagement initiatives.

Key Features Email Verification**: Validates email addresses using Verifi Email API to prevent fraud and ensure deliverability Dynamic Promo Cards**: Generates stunning, personalized promotional cards with custom discount codes and QR codes Automated Email Delivery**: Sends professionally designed HTML emails with embedded promo card images Real-time Logging**: Tracks all promo distributions in Google Sheets for monitoring and analytics Error Handling**: Includes error path for invalid emails with admin notifications Fully Customizable**: Easy to customize card design, email template, and discount values

Workflow Process

Webhook Trigger: Receives user data (name, email, promo_code, discount_value, discount_type) Data Processing: Formats and validates incoming data with default values Email Verification: Checks email validity using Verifi Email API Validation Gateway: Routes valid emails to generation or invalid to error path Card Generation: Creates personalized promo card image using HTML/CSS to Image API Email Delivery: Sends beautifully designed email with promo card via Gmail Logging: Records successful distributions in Google Sheets Error Notification: Sends admin alerts for failed attempts

What's Included

Beautiful Promo Card Design Gradient purple background (#667eea to #764ba2) Personalized greeting with customer name Prominent discount display in circular badge QR code for easy checkout redemption Validity date clearly shown Professional, mobile-responsive design

Professional Email Template Engaging gradient header matching promo card Highlighted promo code section with dashed border Three feature icons (Easy to Use, Exclusive Deal, Limited Time) Call-to-action button Embedded promo card image Clean footer with expiry and contact info

Required Integrations & APIs

1. Verifi Email API Purpose**: Email verification and validation Get API Key**: https://verifi.email Setup**: Sign up → Generate API key → Add to workflow credentials

2. HTML/CSS to Image API Purpose**: Convert HTML promo card to PNG image Get API Key**: https://htmlcsstoimg.com Setup**: Create account → Copy API key → Configure in workflow

3. Gmail API (OAuth2) Purpose**: Send personalized promo emails Get Credentials**: https://console.cloud.google.com/ Setup Steps**: Create new project Enable Gmail API Create OAuth 2.0 Client ID Add credentials to n8n

4. Google Sheets API Purpose**: Log promo distributions for tracking Get Credentials**: https://console.cloud.google.com/ Setup Steps**: Enable Google Sheets API Create Service Account (or use OAuth2) Share your Google Sheet with the service account email Add credentials to n8n

Quick Start Guide

Step 1: Import the Workflow Copy the workflow JSON Go to n8n dashboard Click "Import from File" or "Import from URL" Paste the workflow

Step 2: Configure Credentials Set up the following credentials in n8n: Verifi Email API credentials HTML/CSS to Image API credentials Gmail OAuth2 credentials Google Sheets credentials

Step 3: Create Google Sheet Create a new Google Sheet Add headers: Timestamp, Name, Email, Promo Code, Discount Value, Status Share with your service account (if using service account auth) Copy the Sheet ID and update in the workflow

Step 4: Customize Settings QR Code URL**: Update the checkout URL in the promo card HTML (line with YOURSTORE.com) Admin Email**: Change admin notification email in the "Error Path" node Validity Date**: Update expiry date in both promo card and email template Colors/Design**: Customize gradient colors and styling as needed

Step 5: Test the Workflow Activate the workflow Copy the webhook URL Send a POST request with test data: { "name": "John Doe", "email": "john@example.com", "promo_code": "SAVE20", "discount_value": "20%", "discount_type": "percentage" }

Input Parameters

Send a POST request to the webhook with the following JSON body:

{ "name": "Customer Name", // Optional: defaults to "Valued Customer" "email": "customer@example.com", // Required: customer email address "promo_code": "SUMMER25", // Optional: defaults to "WELCOME10" "discount_value": "25%", // Optional: defaults to "10%" "discount_type": "percentage" // Optional: defaults to "percentage" }

Use Cases

E-commerce Welcome offers for new customers Abandoned cart recovery with discount codes Birthday/anniversary promotions Loyalty rewards for repeat customers

Marketing Campaigns Seasonal sale promotions Referral program rewards Social media contest prizes Email list incentives

Customer Engagement Re-engagement campaigns VIP member benefits Event registration perks Survey completion rewards

Customization Options

Promo Card Design Modify colors and gradients in the HTML/CSS Change logo/emoji in the header Adjust card dimensions and layout Customize QR code size and styling Update validity date format

Email Template Change email subject line Modify header text and styling Add company branding/logo Customize CTA button text and link Update footer information

Business Logic Add conditional discounts based on user tier Implement time-based validity Add product-specific promo codes Include multiple discount tiers Add custom validation rules

Monitoring & Analytics

The workflow automatically logs: Timestamp of each promo distribution Customer name and email Promo code assigned Discount value Distribution status (Success/Failed)

Use this data to: Track campaign performance Monitor redemption rates Identify popular discount amounts Analyze email delivery success Debug failed attempts

Troubleshooting

Common Issues

Email not sending: Verify Gmail API credentials are correct Check OAuth2 token hasn't expired Ensure Gmail account has proper permissions

Image not generating: Confirm HTML/CSS to Image API key is valid Check API usage limits haven't been exceeded Verify HTML syntax is correct

Email validation failing: Ensure Verifi Email API credentials are active Check API rate limits Verify email format in incoming data

Google Sheets not updating: Confirm Sheet ID is correct Check service account has edit permissions Verify sheet name matches configuration

Pro Tips

Test with Invalid Emails: Try sending to invalid emails to verify error handling works Monitor API Limits: Keep track of API usage to avoid hitting rate limits A/B Test Designs: Create multiple card variations to see which performs better Personalize Further: Add more custom fields like user tier, purchase history, etc. Schedule Reports: Create a companion workflow to send daily/weekly promo distribution reports

Performance Metrics

Processing Time**: 30-60 seconds per request Success Rate**: 95%+ for valid email addresses Scalability**: Handles hundreds of requests per hour Error Recovery**: Automatic admin notifications for failures

Security & Privacy

Email validation prevents spam and fraud No sensitive data stored in workflow All API credentials encrypted in n8n Google Sheets logging can be disabled if needed Compliant with email marketing best practices

Best Practices

Email Deliverability: Always validate emails before sending Rate Limiting: Implement delays for bulk sends to avoid spam filters Personalization: Use customer names and relevant discount amounts Clear CTAs: Make it easy for customers to redeem their codes Tracking: Monitor distribution and redemption metrics Testing: Always test with real emails before launching campaigns

📄 License

This workflow template is provided as-is for use in your n8n instance. Feel free to customize and adapt to your specific needs.

Why Use This Workflow?

✅ Saves Time: Automates entire promo distribution process
✅ Reduces Errors: Email validation prevents bounce rates
✅ Professional Output: Beautiful, branded promo cards
✅ Easy Tracking: Real-time logging in Google Sheets
✅ Scalable: Handles high volume campaigns
✅ Customizable: Easy to adapt to your brand
✅ Cost-Effective: Uses affordable or free tier APIs

Perfect for marketers, e-commerce managers, and anyone looking to automate personalized promotional campaigns!