No, Flow Dollars do not expire. They are stored in your Flow account indefinitely.

Yes, you can top up Flow Dollars with cash at selected merchant locations. Navigate to your app’s ‘Flow Dollars’ page and present the top-up barcode to the cashier, pay for the top-up value in cash, and enter the redeem code printed on the receipt into the app.

Once the Flow Dollars are redeemed, they are not transferable.