 The value stored on the card is called "Myki money".You can top up on a bus with a maximum value of $20 on board Except on routes 401 and 601 ,Hundreds of shops including all 7-Elevens that displaying the myki sign, myki machine at most major bus and tram interchanges and at most Railway Stations, staffed railway station, on buses except on routes 401 and 601, the PTV Hub, online on the Myki website or by calling Public Transport Victoria

At the start of a trip, the passenger must "touch on" the card at a Myki reader, and at the completion of a trip (except for a tram trip that is solely within zone 1), a passenger must "touch off" the Myki card again, at which point the appropriate fare is assessed and deducted from the stored value on the card.The Myki card, if placed correctly in a wallet, does not need to be removed to be validated.