Late last year, routine verifications at a few well-known biryani restaurants in Hyderabad triggered a far larger inquiry. There was no dramatic “crackdown”. Business continued normally. Customers dined, kitchens functioned, and billing counters appeared orderly. Yet, officers noticed something subtle: the visible volume of diners did not align with the revenue reflected in billing systems.

A closer look reportedly revealed that certain cash transactions were being entered into the system and later disappearing. The turning point came when officials observed that multiple establishments exhibiting similar data behaviour were using the same billing platform. The inquiry expanded beyond individual outlets to backend billing systems located outside the state.

From physical checks to digital trails

Authorities are understood to have accessed massive volumes of stored billing data—running into dozens of terabytes—covering lakhs of restaurants across the country over several years. The scale of analysis marked a clear departure from routine methods of tax investigation. Instead of relying primarily on physical books or traditional survey and search operations, officers began reconstructing digital trails from centralised billing servers.

AI tools were reportedly deployed to identify deletion patterns and piece together fragmented records. Even where invoices had been removed from the user interface, traces remained in system logs, timestamps and server histories. These digital residues enabled reconstruction of transaction flows. Preliminary findings suggest that a portion of cash invoices had been erased after generation and that turnover declared in statutory returns was lower than what cloud billing records reflected.

These remain investigative findings. Final conclusions will depend on statutory........

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