Although there is regulation provided for litigation between Public Administrations, the provisions therein are sparse and confusing. The problems associated thereto begin with the regulation for the prior legal requirement set out in article 44 of the Contentious Act, whose difficult interpretation has been further intensified by case law doctrine which is disputable and superfluous and casts serious doubts on the legal affairs of the Administrations. The work sets out this case law and the challenges and difficulties posed as a result.