---
title: "Changes to Upload exemption certificate"
method: POST
path: "/v1/exemptions/{exemption_id}/attachments"
---

# Changes to Upload exemption certificate

`POST /v1/exemptions/{exemption_id}/attachments`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 1 of 5 revisions.

- **2026-08-29** `6ba4f4c774c3` — 2 breaking, 3 info

## Changes

- **2026-08-29** `6ba4f4c774c3` — 2 breaking, 3 info
  - added the new required `header` request parameter `x-organization-id`
  - the `file` request property contentMediaType changed from `` to `application/octet-stream`
  - the endpoint scheme security `APIKeyHeader` was added to the API
  - the endpoint scheme security `APIKeyHeader AND CustomHeader` was removed from the API
  - the `file` request property format was generalized from `binary` to no format
  - …this revision’s changelog is incomplete

---

[Operation](https://skmtc.dev/trykintsugi/apis/tax-platform/docs/v1/exemptions/:exemption_id/attachments/post.md) · [API](https://skmtc.dev/trykintsugi/apis/tax-platform.md) · [Page](https://skmtc.dev/trykintsugi/apis/tax-platform/changes/v1/exemptions/:exemption_id/attachments/post)