What is the terminologi for an address that starts with tz and for one that starts with KT1? The former is controlled by a secret key, and the latter is controlled by a piece of Michelson code that was published on the blockchain.

  • Does this answer your question? What is the difference between implicit vs originated accounts?
    – arvidj
    Sep 24, 2020 at 8:23
  • Not fully as the accepted answer uses "originated contracts" and the other uses "originated accounts". Sep 24, 2020 at 8:32
  • @arvidj: this is a bit old. Since Babylon all accounts are delegatable, each smart contract has a script, and the only way to spend from or change the delegation of a smart contract is by running its code and having it emit the appropriate operation. Sep 24, 2020 at 8:32
  • I was looking for the official terminology, so I could ensure we used the same words. Sep 24, 2020 at 8:40

1 Answer 1


As said in the glossary, tz accounts are called "implicit accounts" and KT1 accounts are called "originated accounts" or "smart contracts" (these two expressions are synonyms since Babylon).

  • Thanks for the reference to the official documentation! Sep 24, 2020 at 8:32

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