Which scenario would require filling out a new PS Form 3546X?

Filling out a new PS Form 3546X is necessary when a customer moves to a new address. This form is used for updating records and ensuring that mail is forwarded accurately to the customer's new location. When a customer relocates, their previous address becomes invalid for mail delivery, and the USPS must have updated information to direct their mail correctly.

The other scenarios, while they may require changes to service or account details, do not specifically necessitate the completion of a PS Form 3546X. Changing a phone number or stopping mail service can typically be addressed through customer service or online adjustments without a need for a specific form dedicated to address change. A holiday hold, which temporarily suspends mail delivery, is also managed through different channels rather than requiring a new form dedicated to changes in residence.