Abstract
The article refers to additional civil law protection of claims of subcontractors and further subcontractors participating in execution of public contracts introduced by the act of 8 November 2013 amending the Public Procurement Act (Art. 143a--143d of the Public Procurement Act). The author analyses the purposes for which that protection was granted, its substantive and objective scope, requirements, as well as legal instruments used to protect subcontractors’ claims. The article also provides a comparison of the regulations of Art. 143a--143d of the Public Procurement Act with the parallel protection regime arising from Art. 6471 of the Civil Code.