Yeah I don't have a printer at home, last time I had to do something like that, I wrote the required stuff on a paper, took a picture with my phone, used PAINT.

Yeah I don't have a printer at home, last time I had to do something like that, I wrote the required stuff on a paper, took a picture with my phone, used PAINT.NET to put it on their document at the right place and messed the colors/contrast a bit to look scanned.