---
title: setAttributesInBatchFlat
slug: campaign/docs/setattributesinbatchflat
docTags: 
createdAt: 2026-07-02T19:01:45.941Z
---

**Type**: void

**Parameters**

| Name                | Type       | Value                                                                                                                                                                           |
| ------------------- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| sessionId           | String     | ID of the session                                                                                                                                                               |
| recipientListId     | long       | ID of the recipient list                                                                                                                                                        |
| recipientIds        | String\[ ] | IDs of the recipients                                                                                                                                                           |
| attributeNames      | String\[ ] | Names of the fields (e.g., firstname, lastname etc.) to be updated                                                                                                              |
| flatAttributeValues | String\[ ] | New values for the attributes/fields defined with **attributeNames**<br /><br />Each entry must be formatted according to the [formatting rules](docId\:oBo45vU4YUXzQMBi5Pwvz). |

**Return values**

- **Code structure**

```javascript
void setAttributesInBatchFlat(String sessionId, long recipientListId, String[] recipientIds, String[] attributeNames, String[] flatAttributeValues)
```