Good question — not all post offices have fax machines anymore, but some still do. I actually tried it last month when my home printer died. It worked, but it was a bit pricey compared to other options. I’d check your local branch first. I found useful info about USPS fax services on psgolfcourses.com; they break down which post offices still offer faxing and what it costs. Personally, I prefer using Office Depot — it’s more consistent and open longer hours.