A usability tip for developers of online stores and other systems that send customers invoices

When you send a cus­tomer an invoice to pay through a bank, make the invoice both as a .pdf and as a text ver­sion of the pay­ment details. Some people use online pay­ment sys­tems (online man­age­ment of their bank account), such as Privat24, PrivatBank’s online bank­ing, and they’ll have to type your invoice in by hand instead of simply copy­ing the details. PDF is still just about bear­able: you can at least select the text in it (with cer­tain skills :), but some people make their invoices as .jpg, and that’s really inconvenient.