In 2019-2021, a large-scale project to study corruption in Russian public procurement was conducted. One of its main results was a detailed catalog of 100 undue techniques used by unscrupulous customers to design corrupt tenders. The catalog seeks to contribute to enhancing corruption prevention and detection methods. Though based on always specific national experience, it can inform the design of public procurement policies in a highly corrupt environment in general and be adapted to the needs of other countries. 

The catalog is presented in two formats: 1) a more extensive SSRN publication, and 2) electronic cards containing the names and brief descriptions of undue techniques.