The Scenario
You are an office manager at a property management company. The rent-increase notices have to go out by end of week. You have 400 tenant rows in a Google Sheet: tenant name in column A, address line in column B, city in column C, state in column D, ZIP in column E, current rent in column F, and new rent in column G.
A PostGrid letter template is already designed: template ID tmpl_notice01, with merge fields for the tenant name and new rent amount. Every tenant gets a letter. Every letter ID goes back into the sheet for the property manager's records.
The slow version:
- You ask IT to write a script to loop through the sheet and call PostGrid
- IT says next sprint
- You try sending the letters manually through the PostGrid dashboard
- By letter 30, the property manager asks if you are done yet
- End of week arrives with 370 notices unsent and a legal deadline missed.
The fast version is one prompt.
The Easy Way: One Prompt in SheetXAI
SheetXAI reads your tenant sheet and calls PostGrid's letter endpoint for each row, writing the letter IDs back so the property manager has a complete delivery record.
Open the SheetXAI sidebar and type:
For every row in the 'Tenants' sheet, create a PostGrid letter using template ID tmpl_notice01. Merge the tenant name from column A and the new rent amount from column G into the template. Use the address in columns B through E for delivery. Write each returned letter ID into column H.
SheetXAI iterates through all 400 rows, calls PostGrid's letter creation endpoint with the right merge values for each tenant, and writes each letter ID back to column H. Four hundred letters queued. Column H filled.
What You Get
400 PostGrid letter orders, logged back to the sheet:
- Letter ID — written to column H, one per tenant
- Merge values — tenant name and new rent pulled from the correct columns per row
- Template used — tmpl_notice01, consistent across all 400 letters
- Audit trail — column H lets you look up any letter's PostGrid status by ID
The IDs in column H are the property manager's compliance record. If a tenant disputes receiving the notice, you pull their letter ID from column H and show the PostGrid delivery timestamp. No scrambling.
Need only certain tenants? Add "only process rows where column I says 'Increase'" and SheetXAI filters the sends without you having to hide rows.
What If the Data Is Not Quite Ready
Tenant data from property management systems exports with formatting issues almost every time. SheetXAI handles the cleanup and the sends in the same prompt.
When rent amounts are formatted as currency strings
Column G has values like "$2,450.00" with dollar signs and commas. PostGrid's merge fields need plain numbers.
Strip dollar signs and commas from the rent values in column G so they are plain numeric values. Then create a PostGrid letter for each row using template tmpl_notice01, merging the name from column A and the cleaned rent from column G, with delivery address from columns B through E. Write the returned letter ID into column H.
When some rows are exempt from the rent increase
Some tenants are on fixed-term leases marked 'Exempt' in column I. They should not receive a notice.
For each row in the 'Tenants' sheet where column I does not say 'Exempt', create a PostGrid letter using template tmpl_notice01 with tenant name from column A and new rent from column G, delivery address from columns B through E. Write the returned letter ID into column H. Leave exempt rows untouched.
When addresses need to be verified before sending
The sheet has some rows where the ZIP code does not match the city. You want those flagged before the letters go out.
Before creating PostGrid letters, check each row's city in column C against the ZIP code in column E. For rows where the city and ZIP do not match standard US data, write 'VERIFY ADDRESS' into column H and skip the PostGrid call. For all other rows, create the PostGrid letter and write the returned letter ID into column H.
When amounts need cleaning, exemptions apply, addresses need verification, and you want a summary count at the end
The export has currency-formatted rents, some exempt rows, some questionable ZIPs, and the property manager wants a total count of letters sent versus skipped in a summary cell.
Strip dollar signs and commas from column G. For rows where column I says 'Exempt', write 'EXEMPT' into column H and skip the send. For remaining rows, check city-ZIP consistency. For rows that pass, create a PostGrid letter using template tmpl_notice01 with tenant name from column A and clean rent from column G, address from columns B through E, and write the letter ID into column H. For rows that fail the ZIP check, write 'VERIFY ADDRESS' into column H. Finally, write a summary into cell H402: total letters sent, total skipped, total flagged for review.
The pattern: data validation, conditional filtering, merge, and send all run from one prompt. The property manager gets a clean letter queue and a one-cell summary.
Try It
Get the 7-day free trial of SheetXAI and open any tenant or recipient sheet, then ask it to fire a PostGrid letter campaign. The PostGrid integration is included in every SheetXAI plan. For a related workflow, see how to send bulk personalized postcards from a sheet or the PostGrid in Google Sheets overview.