# Take back an unpaid application

`remove_unpaid_exam`

- Destructive
- Needs confirmation

Removes one unpaid exam application from one of this account’s students, along with its pending payment and everything recorded against it. A paid application, or one the student has already sat, cannot be removed here at all — the platform refuses it. This cannot be undone from here: re-applying afterwards is a new application at whatever the fee then is. The person themselves has to confirm it, so a client that cannot ask them gets a panel link and nothing is done.

- **For**: Teachers and partners
- **Needs**: Read and write access (`mcp:write`)
- **What it changes**: **Destructive.** It cannot be undone, so your own app has to ask you first. An app that cannot ask you is refused, and the tool answers with a link to do it in your panel instead.
- **Repeating it**: Not safe: the same call twice can change data twice.

## Inputs

- `brand`string

  Which olympiad this is about. Required unless the connection covers exactly one, in which case that one is used.

  one of`coding``gmath``hilingua``neo``stem`
- `student`stringrequired

  The opaque student handle from a roster tool.

  pattern`^stu_[A-Za-z0-9._-]{1,1000}$`min length`5`max length`1024`
- `application_id`stringrequired

  The application_id from that student’s row.

  pattern`^[a-f0-9]{24}$`min length`24`max length`24`
- `confirmation`string

  The `confirmation` value from this tool’s own `confirmation_required` answer. Send it back with exactly the same other arguments to go ahead; never invent one.

  pattern`^cfm_[A-Za-z0-9._-]{1,4000}$`min length`5`max length`4096`

The server refuses a call that carries any field not listed here, and says which one.

## Answers instead of a result

What the tool says when it cannot do what was asked, and what to do about it.

- **`not_connected`**
- **`insufficient_scope`**
- **`rate_limited`**
- **`writes_disabled`**
- **`temporarily_unavailable`**
- **`upstream_error`**
- **`brand_not_allowed`**
- **`role_required`**
- **`tenant_account_missing`**
- **`confirmation_expired`**
- **`cannot_cancel`**
- **`not_found`**