One tricky part of this is you'd need to reeducate users that contactless credit cards can also get charged -- so if you put a Clipper and a credit card in a wa

One tricky part of this is you'd need to reeducate users that contactless credit cards can also get charged -- so if you put a Clipper and a credit card in a wallet, you need to be careful to not accidentally pay twice. Vancouver just enabled this on their transit system, and they had posters all over warning people to not swipe their whole wallet over the readers like they were used to doing.