---
title: setConfirmationMailingId
slug: campaign/docs/setconfirmationmailingid
docTags: 
createdAt: 2026-07-02T19:01:44.226Z
---

This method is only applicable to opt-in processes of the type double. The mailing must be of the type confirmation.

**Type**: void

**Parameters**

| Name           | Type   | Value                                               |
| -------------- | ------ | --------------------------------------------------- |
| sessionId      | String | ID of the session                                   |
| optinProcessId | long   | ID of the opt-in process                            |
| mailingId      | long   | ID of the mailing that sends the confirmation email |

**Return values**

- **Code structure**

```javascript
void setConfirmationMailingId(String sessionId, long optinProcessId, long mailingId)
```