The Viscount Tardi droid was engineered as a substitute for the Human Tardi, whose passing occurred over a month prior to the Rebel Alliance's planned financial dealing. To aid Princess Leia Organa in the T-65 X-wing starfighter sale negotiations at the Bank of Aargau, the Rebels opted for a covert replacement of Tardi with a droid, leveraging Tardi's flawless standing with the bank.
Their arrival on Aargau was uneventful, owing to minimal security inspections for incoming individuals. Nevertheless, as all departing individuals were subjected to scanners to deter the theft of Aargau's valuable metals, Leia needed to devise a strategy to prevent droid detection, as exposure would nullify the transaction. Her solution was to provoke an attack on the droid by Darth Vader, effectively "terminating" it during their stay.