--- title: "Update an owner" slug: "update-an-owner" updated: 2024-08-21T13:53:27Z published: 2026-02-10T10:27:20Z --- > ## Documentation Index > Fetch the complete documentation index at: https://www.bloxs.io/llms.txt > Use this file to discover all available pages before exploring further. # Update an owner Put/api/v1/relations/owners Update an existing owner. This will fully overwrite the owner with the data from the request. **Description** Update an existing owner. This will fully overwrite the Owner with the data from the request. Both the 'reference' and the 'externalIdentifier' can be used to identify the owner which needs to be overwritten. Preferably only the reference is used. If this is not available, the externalIdentifier can be used. If both properties are used it is important that both are correct and match with the same entity (owner). If this is not the case, the request will return with an error code and the owner will not be overwritten. Owner pertains to real estate owners. Each owner has their own financial administration. Adding a new owner automatically triggers the creation of a new financial administration. **Use Case** The Bloxs user has added an owner with several incorrect properties. Therefore the user wants to change multiple properties at the same time rather than making several requests and changing one property at a time. | Field | Description | | --- | --- | | externalIdentifier | The unique identifier within the system of the requesting party. This identifier is not generated by the Bloxs system. | | phoneNumber | Phone number of the owner. | | mobileNumber | Mobile phone number of the owner. | | cocNumber | Chamber of Commerce number. | | cocDescription | Additional information about the Chamber of Commerce number. Termed as KVK description in the Bloxs system. Extra information can be entered here regarding the Chamber of Commerce number. | | vatNumber | VAT (BTW) number of the owner. | | correspondenceMethod | The default method of correspondence. This field is an integer with 2 options: 1 = Email 2 = Post If the correspondenceMethod is set to Email, then the primaryEmailAddresses field is mandatory. If the CorrespondenceMethod is set to Post, then the Address field is mandatory. | | remarks | General comments. Please note: Avoid including sensitive information here, such as passwords or sensitive personal data. | | languageISOCode | ISO language code. Use the 2-letter code from the ISO 639-1 Code list. | | address | The address of the owner. | | street | The street of the owner. | | houseNumber | The house number of the owner. | | postalCode | The postal code of the owner. | | city | The place of residence of the owner. | | countryISOCode | ISO country code. Use the 2-letter code from the ISO 639-1 Code list. | | invoiceAddress | The billing address of the owner. In case this field is empty, the data from 'address' will be used. This is mainly relevant for certain templates. | | postalAddress | The postal address of the owner. In case this field is empty, the data from 'address' will be used. This is mainly relevant for certain templates. | | primaryEmailAddresses | Primary email address used by the relation. If other email addresses are left empty, this email address will be used for correspondence. | | invoicesEmailAddresses | The email address used to send invoices. | | paymentRemindersEmailAddresses | The email address used to send reminders regarding payments. | | indexationsEmailAddresses | The email address to which the annual rent increase (indexation) is sent. | | serviceTicketsEmailAddresses | The email address to which all maintenance notifications are sent. This may differ from the general email address. For instance, in the case of a shared office space where all communication is centralized through one central desk instead of being handled separately by individual tenants. | | purchaseOrdersEmailAddresses | All communication specifically related to procurement is conducted through this email address. This is primarily applicable to large parties where procurement processes are managed through separate email accounts. | | portalsEmailAddresses | Within Bloxs, a portal account for customers or tenants can be opened. Through this field, you can provide multiple email addresses that need to be granted access. | | otherEmailAddresses | Other email addresses. | | name | Name of the relation. | | website | Website of the relation. | | reference | The relationship number within Bloxs. This is unique (per client specific environment) for all relationships (EstateAgents, Organisations, Owners, Persons, Suppliers). The relationship number is generated by the Bloxs system . | SecurityHTTPType Bearer Please enter a valid token Body parametersExpand Allobject languageISOCodestring | null Min length0Max length2 addressobject (Address) streetstring RequiredMin length0Max length200 houseNumberstring | null Min length0Max length40 postalCodestring RequiredMin length0Max length20 citystring RequiredMin length0Max length200 countryISOCodestring RequiredMin length0Max length2 invoiceAddressobject (Address) streetstring RequiredMin length0Max length200 houseNumberstring | null Min length0Max length40 postalCodestring RequiredMin length0Max length20 citystring RequiredMin length0Max length200 countryISOCodestring RequiredMin length0Max length2 postalAddressobject (Address) streetstring RequiredMin length0Max length200 houseNumberstring | null Min length0Max length40 postalCodestring RequiredMin length0Max length20 citystring RequiredMin length0Max length200 countryISOCodestring RequiredMin length0Max length2 primaryEmailAddresses Array of string | null string invoicesEmailAddresses Array of string | null string paymentRemindersEmailAddresses Array of string | null string indexationsEmailAddresses Array of string | null string serviceTicketsEmailAddresses Array of string | null string purchaseOrdersEmailAddresses Array of string | null string portalsEmailAddresses Array of string | null string otherEmailAddresses Array of string | null string externalIdentifierstring | null Min length0Max length100 phoneNumberstring | null mobileNumberstring | null cocNumberstring | null Min length0Max length256 cocDescriptionstring | null vatNumberstring | null Min length0Max length256 correspondenceMethodinteger (int32) RequiredValid values[ 1, 2 ] remarksstring | null namestring RequiredMin length0Max length256 websitestring | null referencestring | null Min length0Max length100 Responses200 The owner was updated Expand Allobject languageISOCodestring | null Min length0Max length2 addressobject (Address) streetstring Min length0Max length200 houseNumberstring | null Min length0Max length40 postalCodestring Min length0Max length20 citystring Min length0Max length200 countryISOCodestring Min length0Max length2 invoiceAddressobject (Address) streetstring Min length0Max length200 houseNumberstring | null Min length0Max length40 postalCodestring Min length0Max length20 citystring Min length0Max length200 countryISOCodestring Min length0Max length2 postalAddressobject (Address) streetstring Min length0Max length200 houseNumberstring | null Min length0Max length40 postalCodestring Min length0Max length20 citystring Min length0Max length200 countryISOCodestring Min length0Max length2 primaryEmailAddresses Array of string | null string invoicesEmailAddresses Array of string | null string paymentRemindersEmailAddresses Array of string | null string indexationsEmailAddresses Array of string | null string serviceTicketsEmailAddresses Array of string | null string purchaseOrdersEmailAddresses Array of string | null string portalsEmailAddresses Array of string | null string otherEmailAddresses Array of string | null string externalIdentifierstring | null Min length0Max length100 phoneNumberstring | null mobileNumberstring | null cocNumberstring | null Min length0Max length256 cocDescriptionstring | null vatNumberstring | null Min length0Max length256 correspondenceMethodinteger (int32) Valid values[ 1, 2 ] remarksstring | null namestring Min length0Max length256 websitestring | null referencestring | null Min length0Max length100 displayNamestring | null archiveDatestring (date) | null 400 The owner data has validation issues Expand Allobject typestring | null titlestring | null traceIdstring | null statusinteger (int32) errorsobject | null property* Array of string | null additionalPropertiesstring