Source: https://manu-tests-all-orgs.docs-staging.pageloop.ai/mcp-tools/custom-objects/other/patch-custom-object-by-display-id

# patchCustomObjectByDisplayId

Partial update a custom object instance by display ID.

Partially updates a custom object instance identified by display ID. Only fields sent
in `form_fields` are changed, and the activity log records only those patched fields.

## Parameters

| Name          | Type   | Required | Description                                                           |
| ------------- | ------ | -------- | --------------------------------------------------------------------- |
| `displayId`   | string | Yes      | Display ID formatted as `PREFIX-NUMBER` (e.g., "VEN-42", "VISA-100"). |
| `form_fields` | object | No       | Partial custom field values keyed by field reference\_key.            |