# entries.evidence.confirm

Verify and append a prepared supporting original to its exact transaction with entryId, submissionId and idempotencyKey. Returns the preserved evidence and an extraction-only job; reading never creates purchases or changes financial fields. Duplicate originals on the same transaction are reused.

`POST /api/v1/accounting/entries.evidence.confirm`

Permissions: `accounting:read`, `accounting:write` · Roles: admin, finance · Idempotency key required

MCP tool: `accounting_entries_evidence_confirm`

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `entryId` | string (ID) | Yes | The ID of an accounting entry, from entries.list or attention.mine. |
| `submissionId` | string (ID) | Yes | The ID of an upload, returned by uploads.prepare or uploads.inline. |
| `idempotencyKey` | string | Yes | Any unique text you generate once per intended change, so a retried request only happens once. Send it as the Idempotency-Key header instead if you prefer; if you send both they must match. 8–200 characters. |

## Example request

```bash
curl https://app.getoatmilk.com/api/v1/accounting/entries.evidence.confirm \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "entryId": "7f0f6c1e-1c1f-4b5e-9c8d-2f5e8e3c1a10",
  "submissionId": "9a8b7c6d-5e4f-4a3b-8c2d-1e0f9a8b7c6d"
}'
```

Reference page: https://app.getoatmilk.com/docs/api/entries.evidence.confirm