I think it's since they moved premises, we received a text on our mobile asking us to go and confirm our information. Went last Thursday morning, showed the text to the doorman and he sent us straight upstairs. The young lady up there wanted passports, proof of address (i.e. RP's or Tapu or rental contract) and our account cards. She told us it was for security purposes. As I always carry copies of passports and RP's we were all done and dusted in about 10 minutes, even got offered tea.