--- title: "Changes to Deregister registration" method: POST path: "/v1/registrations/{registration_id}/deregister" --- # Changes to Deregister registration `POST /v1/registrations/{registration_id}/deregister` > Every recorded change to this operation, newest first. ## Timeline Changed in 11 of 37 revisions. - **2026-10-28** `2c90b14ca671`: 1 warning - **2026-10-22** `d251e3228d00`: 2 info - **2026-10-16** `5aac489fbe23`: 7 breaking - **2026-10-09** `47ea0598da9f`: 2 warning - **2026-09-29** `89cfba727d61`: 1 info - **2026-09-24** `460fe06a9b8b`: 1 warning - **2026-09-23** `eca1a57d7360`: 6 breaking, 1 warning, 1 info - **2026-09-22** `110b0cbcc9f5`: 4 info - **2026-09-15** `bd1bad0a9967`: 1 info - **2026-09-07** `6148009048f7`: 1 info - **2026-08-29** `6ba4f4c774c3`: 25 breaking, 4 warning, 279 info ## Changes - **2026-10-28** `2c90b14ca671`: 1 warning - added the new `SMALL_PARCEL_VAT` enum value to the `tax_type` response property for the response status `200` - **2026-10-22** `d251e3228d00`: 2 info - added the optional property `kintsugi_mail_confirmed_at` to the response with the `200` status - added the optional property `kintsugi_mail_on_file` to the response with the `200` status - **2026-10-16** `5aac489fbe23`: 7 breaking - the `created_at/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - the `deregistration_acknowledged_at/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - the `deregistration_completed/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - the `deregistration_requested/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - the `marked_collecting_date/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - the `registration_completed/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - the `registration_requested/anyOf[subschema #1]/` response's property format changed from `date-time` to no format for status `200` - **2026-10-09** `47ea0598da9f`: 2 warning - removed the optional property `retail_delivery_fee_effective_from` from the response with the `200` status - removed the optional property `retail_delivery_fee_obligated` from the response with the `200` status - **2026-09-29** `89cfba727d61`: 1 info - added the optional property `is_pre_collecting` to the response with the `200` status - **2026-09-24** `460fe06a9b8b`: 1 warning - added the new `RETAIL_DELIVERY_FEE` enum value to the `tax_type` response property for the response status `200` - **2026-09-23** `eca1a57d7360`: 6 breaking, 1 warning, 1 info - added the new required request property `closure_date` - added the new required request property `final_return_acknowledged` - added the new required request property `reason` - removed `#/components/schemas/DeregisterRegistrationRequest, subschema #2` from the request body `anyOf` list - request body became required - the request's body type changed from no type to `object` - removed the optional property `deregistration_acknowledged_by` from the response with the `200` status - added the new optional request property `request_id` - **2026-09-22** `110b0cbcc9f5`: 4 info - added the optional property `deregistration_acknowledged_at` to the response with the `200` status - added the optional property `deregistration_acknowledged_by` to the response with the `200` status - added the optional property `deregistration_closure_date` to the response with the `200` status - added the optional property `deregistration_reason` to the response with the `200` status - **2026-09-15** `bd1bad0a9967`: 1 info - added optional request body - **2026-09-07** `6148009048f7`: 1 info - added the optional property `period_end_month` to the response with the `200` status - **2026-08-29** `6ba4f4c774c3`: 25 breaking, 4 warning, 279 info - added the new required `header` request parameter `x-organization-id` - response property `auto_registered` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `comment` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `create_filings_from` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `deregistration_completed` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `deregistration_requested` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `imported` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `initial_sync` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `marked_collecting` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `marked_collecting_date` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `needs_mark_as_collecting` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `registration_completed` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `registration_date` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `registration_email` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `registration_requested` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `sales_tax_id` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `sst_import` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `third_party_enabled` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `two_factor_enabled` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `username` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `vda` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - the `change_regime_status` response's property type changed from `string` to no type for status `200` - the `oss_member_state_of_identification_code` response's property type changed from `string` to no type for status `200` - the `oss_type` response's property type changed from `string` to no type for status `200` - the `registrations_regime` response's property type changed from `string` to no type for status `200` - removed the optional property `deregistration_key` from the response with the `200` status - removed the optional property `registration_key` from the response with the `200` status - added the new `CANCELLED` enum value to the `status` response property for the response status `200` - added the new `SELF_MANAGED` enum value to the `status` response property for the response status `200` - the endpoint scheme security `APIKeyHeader` was added to the API - the endpoint scheme security `APIKeyHeader AND CustomHeader` was removed from the API - added the optional property `create_back_filing` to the response with the `200` status - added the optional property `created_at` to the response with the `200` status - added the optional property `filing_frequency_effective_date` to the response with the `200` status - added the optional property `initial_filing_frequency` to the response with the `200` status - added the optional property `ior_date` to the response with the `200` status - added the optional property `ior_number` to the response with the `200` status - added the optional property `jurisdiction_specific_fields` to the response with the `200` status - added the optional property `retail_delivery_fee_effective_from` to the response with the `200` status - added the optional property `retail_delivery_fee_obligated` to the response with the `200` status - …268 more - …this revision’s changelog is incomplete --- [Operation](https://skmtc.dev/trykintsugi/apis/tax-platform/docs/v1/registrations/:registration_id/deregister/post.md) - [API](https://skmtc.dev/trykintsugi/apis/tax-platform.md) - [Page](https://skmtc.dev/trykintsugi/apis/tax-platform/changes/v1/registrations/:registration_id/deregister/post)