A hidden financial network in Thessaloniki has been uncovered, involving 2,000 companies and 1,300 phantom workers. The investigation revealed the operation of three accountants who created shell companies to facilitate tax evasion. The network was identified through a criminal case that exposed the structure of these fictitious businesses. The companies were used to hide real income and avoid tax obligations. The accountants played a central role in setting up the fake entities. The scheme was discovered during a broader tax fraud investigation. Authorities are now examining the extent of the financial impact. The case highlights the complexity of tax evasion in Greece. The operation involved multiple layers of legal and financial manipulation. The investigation is ongoing as officials seek to trace the full scale of the fraud.