The USPS Postal Store is the primary official source for buying First-Class stamps online.
: These are physical stamps that are mailed to your home or office, which typically takes several business days.
: This platform allows you to print First-Class Mail postage directly onto envelopes or specialized NetStamps labels.
To print First-Class postage immediately from a home or office printer, you must use authorized third-party vendors.
: This service offers a way to generate and print postage for First-Class letters and flats without requiring specialized equipment.