If you purchased your TAP card online or by phone, or if you have a Reduced Fare card, your card is already registered. If you purchased your card at a TAP vending machine or TAP Vendor location, consider registering your card online at taptogo.net.
Yes. Be sure to tap on when boarding and tap off when exiting to complete your trip. It is important to remember to tap off with the same card when exiting in order to close out the trip, as failure to tap off would leave the trip incomplete.
There isn't a daily limit for the number of contactless payments. However, from time to time, when you shop using contactless payments, you'll be asked to put your card into the machine and enter your PIN to verify it's you, before you can use contactless again.