Mr Scalise said he obtained the mailing information through the "world public records" and was searching for relatives of David Jack, who had passed away and left US$9.5 million in an offshore bank account.
"I will prepare every relevant document that will assist your claims and facilitate the release of the fund to you," Mr Scalise said. "Note the transaction is 100% risk free. Once the fund is released to you, we will share in the the ratio of 50% for me, 50% for you as your benefit."
He asks the person to reply via email or call on the numbers provided.
Manager of consumer protection at the Ministry of Business, Innovation and Employment, Mark Hollingsworth, said the letter appeared to have the characteristics of an estate scam.
"Estate scams follow the same basic premise: scammers contact you to say a long lost relative has died and as you have been identified as the next of kin. You have inherited a large sum of money, but first you have to pay legal fees to the scammers," Mr Hollingsworth said.
"Of course, there is no long-lost relative or inheritance, and once you've paid the legal company will disappear - along with your money."
He recommended not responding to such letters - not even as a joke - as it confirms your address, making you a repeat target for fraudsters.
"Throw the letter away or delete the email immediately, and report it to Scamwatch."