> For the complete documentation index, see [llms.txt](https://docs.phase.cash/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.phase.cash/vaults/credit-accounts.md).

# Credit Accounts

Credit Accounts (CAs) are the bread and butter of Phase. To interact with almost anything in the protocol, a user must create or own a CA. They are based on the ERC721 standard and are non-fungible, meaning every CA is different from each other. There can be only one owner of a CA, though it can be given to any contract or EOA, allowing for multisigs to own and mint CAs.\
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Creating one is totally free and only requires gas once, creating happens whenever you interact with the protocol and don't have an account yet. A user can only own one CA, though this might change in the future with improvements to UX.

Currently, no vault or user data is stored on the CAs; they are only used as proof of ownership, though this might change in the future. Minting a new account doesn't affect any other positions, as all of them are isolated.