As Copilot said, receiptfont.com is a really good starting point.
But if you want to save some money on receipt-font licenses, you can most of the time use a simple monospace font to imitate it.
Azeret Mono is good but don't go too hard and use Space Mono or any other extrem variation.
The fonts on receipt printers are never a brand-name font, it's always a font designed for the printer's technical limitations of memory capacity and printing mechanism, probably by the manufacturers. Receiptfont.com sells many receipt fonts digitized.
See a previous question on this, and another.