: While convenient, these retailers often charge the full retail rate or higher, and they do not offer print-on-demand capabilities. Important Limitations
: This service offers a way to generate and print postage for First-Class letters and flats without requiring specialized equipment. can you buy first class postage online
: These are physical stamps that are mailed to your home or office, which typically takes several business days. : While convenient, these retailers often charge the
The USPS Postal Store is the primary official source for buying First-Class stamps online. : While convenient