PostGrid Word Template Integration

I run a subscription service called Weather Checker and want to automate all the paper correspondence we send to customers. Your task is two-fold: build six polished templates and wire them to PostGrid so my web app can trigger print-and-mail jobs with a single click—no manual PDF handling on my end.

The templates I need are:
• Receipt
• Welcome / instruction guide
• Subscription-renewal reminder
• Bill / invoice
• Delinquent-account cancellation notice
• General personalized letter

Each template must contain merge fields for name, postal address, dates, amounts, and an open “notes” block, etc. Following PostGrid metrics for postal printing are critical.

For integration, my web app should work where after I hit “Send,” the letter should be en-route without additional steps.

Deliverables
1. Six .docx templates styled as specified (I have logo and colors for idea), with merge fields clearly labeled.
2. PostGrid ready to drop into my existing web app.
3. Brief README showing how to add or edit fields and update branding if needed.