RFC validation in the API

AAA + AAMMDD + HHH
│       │       └── 3 alphanumeric homoclave characters
│       └────────── Incorporation date (year, month, day)
└────────────────── First 3 letters of the company name

AAAA + AAMMDD + HHH
│       │         └── 3 homoclave characters
│       └──────────── Date of birth (year, month, day)
└──────────────────── 4 letters: first surname (2) + second surname (1) + first name (1)

GET /customers/validate

{
    "Rfc": "EKU9003173C9",
    "Name": "ESCUELA KEMPER URGATE",
    "ZipCode": "26015",
    "FiscalRegime": "601"
}

Legal entity:    ^[A-ZÑ&]{3}[0-9]{2}[01][0-9][0-3][0-9][A-Z0-9]{3}$
Individual:      ^[A-ZÑ&]{4}[0-9]{2}[01][0-9][0-3][0-9][A-Z0-9]{3}$

^[A-ZÑ&]{3,4}[0-9]{2}[01][0-9][0-3][0-9][A-Z0-9]{3}$

    "Issuer": {
        "Rfc": "EKU9003173C9",
        "Name": "ESCUELA KEMPER URGATE",
        "FiscalRegime": "601"
    },
    "Receiver": {
        "Rfc": "URE180429TM6",
        "CfdiUse": "G01",
        "Name": "UNIVERSIDAD ROBOTICA ESPAÑOLA",
        "FiscalRegime": "601",
        "TaxZipCode": "86991"
    }