In recent times, there has been a noticeable increase in cases regarding exclusion criteria for public procurement in Poland, particularly concerning the assessment of contractors' reliability in obtaining public contracts. The concepts of exclusion criteria and the mechanism of 'self-cleaning' play a crucial role in evaluating the eligibility of entrepreneurs participating in public bidding processes. This is significant as the integrity of public procurement is essential for maintaining fair competition and ensuring compliance with legal standards.

The article highlights that exclusion from tenders should primarily target those contractors who pose a risk to the trustworthy execution of contracts or have legal infringements, such as tax arrears or criminal activities. Various exclusion criteria exist, differing in their scope and application (e.g., mandatory or discretionary exclusions, diverse durations). These normative principles aim to protect public interest and promote honest competition within the context of public procurement.

Moreover, the emphasis on self-cleaning mechanisms indicates a growing recognition of the importance of rehabilitating the reputation of contractors who may have previously faced exclusions. This balancing act between maintaining strict standards for eligibility while allowing for corrections fosters an environment where contractors can demonstrate their reliability and improve their standing in the public procurement landscape. Such policies reflect a broader commitment to transparency and ethical conduct in public contracts, which aligns with public accountability and the enforcement of fair business practices.