Caller: Logan (last name unknown)

Known criminal. Currently in prison. Has sent MANY letters to multiple addresses in my apartment complex of 35 units, for NAB Credit Cards under MULTIPLE stolen identities.
At least four different people have had credit cards issued by NAB, and sent to my flat alone.
I've busted the people he sent (while watching from a distance) to go into my street's mailboxes to collect the codes, then credit cards. My box has a lock fortunately so I stopped them reaching the letters in time with their sticky fingers and I've filmed them walking around trying to get into people's apartments.
I've tried to warn NAB to stop sending credit cards to my address and to warn the people named in the letters. But they said they needed the people who's identity has been stolen, to stop the applications for credit cards, themselves.
Which is ridiculous.So I sent the credit cards back to the NAB with a note on the letters. But I continue to receive mail for two of the four people, which I have kept in case the police ever follow up my police report, which they haven't yet.
I don't know how to warn these people or contact them as I don't have social media memberships like Facebook, where I could look up these names and tell them that credit cards are out there being used by criminals. I have opened one letter by mistake and it said that "we are trying to contact you over strange transactions, please contact us"... SO, they must of applied for several types of cards from the same bank (NAB) under the same names. I don't know what else to do for these poor people, who must be in debt by now.
In conclusion, DON'T take calls from this number. He has his fingers in a lot of pies, and who knows, maybe even this phone (number) was stolen as well.