Different card providers have a limit for how long a hold can be valid. MasterCard, Visa, and American Express have partnerships with TryNow that enable a single authorization for 30 days. Discover card shoppers have a limit of 5 days. For Discover shoppers, TryNow refreshes authorizations every 5 days by cancelling the original authorization and replacing with a new one. This ensures that we’re able to charge your card for kept items at the end of the trial. We only hold one authorization at a time, but it may take 24-48 hours for the expired auth to drop off your statement.