The Scenario
Your nonprofit's annual fundraising mailer goes out in three weeks. The direct-mail coordinator pulls up the donor Excel workbook — 4,000 rows, addresses in column A, acquired over six years from paper forms, phone intake, and three different CRM imports. Some of these addresses have never been touched since they were entered.
The bad version:
- You export the worksheet to CSV, upload it to PostGrid's dashboard manually, and wait for the batch to process.
- You download the results file, open it alongside the original workbook, and spend the better part of a morning manually aligning verified addresses back to the correct rows.
- Addresses that couldn't be verified come back without any clear flag, so you cross-reference them by hand against the original list to find which rows need manual review.
The mailer vendor needs the clean file by end of week. Running down 4,000 addresses by hand isn't a task — it's a project, and it's sitting on top of everything else you already owe people.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Excel workbook. It reads the data, understands the layout, and through its built-in PostGrid Verify integration it can validate every address and write the results back without any export step.
Verify each address in column A using PostGrid Verify and write the standardized address and verification status (verified/unverified) back into columns B and C.
What You Get
- Column B receives the standardized, PostGrid-corrected address for each row — properly formatted to USPS delivery standards.
- Column C receives the verification status: "verified" for passing addresses, "unverified" for those PostGrid could not confirm.
- Rows that fail verification are visibly flagged, so your manual review list self-assembles rather than requiring a cross-reference.
- The original data in column A is not overwritten.
What If the Data Is Not Quite Ready
Some addresses have no ZIP code
Verify each address in column A using PostGrid Verify — skip rows where column A is blank, and for any address missing a ZIP code write MISSING ZIP into column C instead of attempting verification. Write all other standardized addresses into column B and status into column C.
Addresses are split across four separate columns
For every row, combine columns A (street), B (city), C (state), D (ZIP) into a structured address and verify with PostGrid — write the corrected full address back into column E and flag unverifiable rows with INVALID in column F.
Some rows already have a verified status from a previous run
Verify addresses in column A using PostGrid Verify — skip any row where column C already says verified. Write standardized addresses into column B and update column C to verified or unverified for all remaining rows.
Full cleanup pass before submitting to the mail vendor
For every row in this workbook: if column A has any obvious formatting issue (missing comma, state written as full name instead of abbreviation), normalize it first, then verify with PostGrid. Write the corrected address into column B, verification status into column C, and flag any address PostGrid marks as undeliverable with UNDELIVERABLE in column D. Return a count of passing and failing addresses in cell F1.
One prompt handles normalization, verification, writeback, flagging, and summary — rather than running each step separately.
Try It
Get the 7-day free trial of SheetXAI and open your donor or contact Excel workbook, then ask it to verify and standardize your address column before your next mailing run. For related workflows, see how to parse free-form address strings or look up city and state from ZIP codes.