Can you only use contactless so many times?
Can you only use contactless so many times? While contactless allows you to make payments without a PIN, it doesn't mean you can forget it entirely. Card issuers only allow five consecutive contactless transactions that can be made before a PIN is requested in order to prevent fraud.
Can contactless charge you twice?
No, there's no need to worry about mistaken double payments. Contactless technology is set up to make sure a second tap isn't registered, and you're only charged for the transaction once.