Racing NSW stewards will look into the books of the Tabcorp Fixed Odds business and other corporate bookmakers after Tabcorp Senior Trading Manager for thoroughbred racing Sally Snow was warned off on Wednesday.

Snow, the figurehead of TAB betting operation, handed her resignation in at Tabcorp earlier in the week.

Her resignation came after she had her repeatedly refused to give her phone to Racing NSW stewards for imaging, asserting her common law privilege against self-incrimination. She has also told stewards she will not provide any information or evidence to the inquiry.

Warned off: TAB bookmaking figurehead Sally Snow has been warned off for failing to cooperate with stewards.

The steward's investigation into betting activities has already questioned several persons of interest and it is understood that forensic accountants have been called in at Tabcorp.