# Mailing-list cleanup checklist

A short check for original values, unit numbers, ZIP codes, and the final envelope.

# US mailing-list cleanup

Original file saved at:
Contact reference used to match rows:
Person responsible for unresolved addresses:

## Protect the fields
- ZIP column imported as text.
- Apartment, suite, and other unit details preserved.
- Names kept separate from postal formatting changes.
- No street numbers or missing units guessed.
- Proposed changes compared with the original source.

## Test the import
Use fictional rows with a leading-zero ZIP, suite, long name, blank optional field, and missing required field. Check the rendered address, not only the upload result.

## Prepare the real mailing
Original count:
Ready count:
Rows waiting for answers:
Final envelope spot-check completed:
Accepted corrections applied to the source system:

Formatting is not proof of deliverability. Keep an unresolved address out of the batch until the missing fact is confirmed.

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From Scribble: https://scribblecards.com/blog/us-mailing-address-standardization

Editorial review: 2026-09-25