# contact_details Contact Details for the individual or organization * Is optional * Type: `object` With the following properties: | Property | Type | Required | Description | | --- | --- | --- | --- | | `EmailAdr` | String | Optional | Address for electronic mail (e-mail). Maximum length: 2048 characters. | | `FaxNb` | Reference | Optional | Fax Number. Defined in `#/definitions/phone_number` | | `MobNb` | Reference | Optional | Mobile Phone Number. Defined in `#/definitions/phone_number` | | `Nm` | String | Optional | Name by which a party is known and which is usually used to identify that party. Maximum length: 140 characters | | `NmPrfx` | String | Optional | List based on ISO 20022 NamePrefix1Code List, the value of this property **must** be equal to one of the [known values](#nmprfx-known-values) below | | `Othr` | String | Optional | Contact details in another form. Maximum length: 35 characters | | `PhneNb` | Reference | Optional | Phone Number. Defined in `#/definitions/phone_number` | ## `NmPrfx` known values | Value | Description | | --- | --- | | `DOCT` | Doctor | | `MIST` | Mister | | `MISS` | Miss | | `MADM` | Madam | ## JSON schema extract ```json "contact_details": { "type": "object", "description": "Contact Details for the individual or organization", "properties": { "CtctDtls": { "type": "object", "description": "Set of elements used to indicate how to contact the party.", "properties": { "NmPrfx": { "type": "string", "description": "List based on ISO 20022 NamePrefix1Code List", "enum": [ "DOCT", "MIST", "MISS", "MADM" ] }, "Nm": { "type": "string", "description": "Name by which a party is known and which is usually used to identify that party.", "maxLength": 140 }, "PhneNb": { "type": "string", "description": "Phone Number", "$ref": "#/definitions/phone_number" }, "MobNb": { "type": "string", "description": "Mobile Phone Number", "$ref": "#/definitions/phone_number" }, "FaxNb": { "type": "string", "description": "Fax Number", "$ref": "#/definitions/phone_number" }, "EmailAdr": { "type": "string", "description": "Address for electronic mail (e-mail).", "maxLength": 2048 }, "Othr": { "type": "string", "description": "Contact details in another form.", "maxLength": 35 } } } } } ```