Get really random coupon codes
from random.org, save as coupons.csv. First line needs to be column title, “Coupons”.
Create PDFs with LaTeX
There are a ton of modules to mail merge documents in LaTeX, but they’re overkill. csvtools simply supplies every column as a macro with \insert<Columnname>
My coupons are only 12x12cm in size, which the printer would not accept, so I set paper size to A4 and padded the paper tray with a little bit of cardboard.