http://2jkgzvmsknxa3yntg77pn43u7elswzbkogk24shx3mucbpve6fry7jad.onion
Under §15(1) ZDP, a Czech individual can deduct donations made for public-interest purposes (culture, science, education, …) once their total deductible donations in a calendar year reach at least 1 000 CZK or 2 % of the tax base (whichever is lower), up to 15 % of the tax base. Below 1 000 CZK the deduction isn't available anyway, so a receipt would carry no value.