# `Localize.UnknownCurrencyError`
[🔗](https://github.com/elixir-localize/localize/blob/v0.22.0/lib/localize/exception/unknown_currency_error.ex#L1)

Exception raised when a currency code is not a known
ISO 4217 or registered custom currency.

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*Consult [api-reference.md](api-reference.md) for complete listing*