Instacart is adjusting how it handles customer tips following the announcement last week of a congressional inquiry into the practice of tip-baiting, in which Instacart allows customers to promise big tips for shoppers only for those customers to later rescind the tip after the order is dropped off.

Instacart now says it will shorten the window a customer can alter their tip from three days down to 24 hours. It’s also now requiring customers leave feedback for removing tips