# NfeAccessKey - `v::nfeAccessKey(string $accessKey)` Validates the access key of the Brazilian electronic invoice (NFe). ```php v::nfeAccessKey()->validate('31841136830118868211870485416765268625116906'); // true ``` *** See also: * [Cnh](Cnh.md) * [Cnpj](Cnpj.md) * [Cpf](Cpf.md)