Yep, sure you can. We request that you email firstname.lastname@example.org first to inform us of the change as one of support team will need to check you off.
When you do come to scan your card or enter your details, the same process applies as the first time. Please double check all personal and bank details.
Don’t forget that due to UK money laundering laws, the name of the bank account owner needs to match the name of the registered Payfriendz user. This may seem trivial but it's an important security measure.