If you bid live, you will see a “Bid won” pop-up.
This information is for information purposes only, as winning bids are not final until they have been confirmed by the auction houses.
After the sale (whether Live or Online), you will receive an email with your auction sale order (an invoice showing the numbers of the lots won, their characteristics, the hammer price and any additional selling costs).
If in doubt, don't hesitate to contact the auction house that is offering the lot you bid on directly.