: Services like Stamps.com allow you to buy and print USPS-approved postage labels directly from your home or office printer.

: Many grocery stores (e.g., Kroger, Publix), pharmacies (e.g., CVS, Walgreens), and big-box retailers (e.g., Walmart) sell books of stamps at their checkout counters or customer service desks.

: Some banks and credit unions sell stamps at the teller window or directly through specialized ATMs.