IntroductionThis Practice Note considers some of the key steps an unsuccessful bidder or tenderer may take after being notified that it has not been awarded an Irish public procurement contract. It explains how to assess and pursue a challenge, including standstill letters and periods, limitation periods, High Court proceedings, automatic suspension and interim measures, and the remedies available before and after contract signature, including setting aside, ineffectiveness, alternative penalties, damages and discovery.For an overview of the Irish public procurement law regime, see Practice Note: Ireland—Public procurement law—fundamental principles.For guidance on EU public procurement, see: EU public procurement (EU Law)—overview.As with any competition or contest, there are almost invariably disappointed tenderers or bidders whenever the results of a public procurement process have been announced. This Practice Note analyses the legal rights of those unsuccessful or disappointed bidders/tenderers. While each case turns on its own facts, this Practice Note analyses the legal remedies which are usually available.It is worth emphasising