Send previous control to client

reference australia Updated Sep 10, 2026 1 min read send-previous-control-client.md

Provide the ability to send previous control to client.

There are two ways to send previous control back from the server when a client requests:

In inbound transformation, set validation_message in result. Previous control will be sent again with message provided in validation_message.
In inbound transformer, set send_prev_control in result to true, previous control will be sent again. Use this method for Multi-Step controls.

Example script:

JavaScript

(function execute (inputs, outputs) {  var result = {};  var request_context = inputs.request_context;  var typed_value = request_context ['typed_value'];  if (typed_value.index0f("#") > -1)    result["validation_message"] = "Invalid character, please don't enter special character '#'";  result["value"] = typed_value;  result["search_text"] = "";  outputs.result - result;})(inputs, outputs);

Parent Topic:Supported Virtual Agent and Agent Chat features for custom chat integrations

41 lines · 1.7 KB Wrap lines

---
title: Send previous control to client
description: Provide the ability to send previous control to client.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/conversational-interfaces/virtual-agent/send-previous-control-client.html
release: australia
product: Virtual Agent
classification: virtual-agent
topic_type: reference
last_updated: "2026-09-10"
reading_time_minutes: 1
breadcrumb: [Supported features for custom chat integrations, Create custom chat integrations, Configure, Virtual Agent, Conversational Interfaces]
---

# Send previous control to client

Provide the ability to send previous control to client.

There are two ways to send previous control back from the server when a client requests:

-   In inbound transformation, set `validation_message` in result. Previous control will be sent again with message provided in `validation_message`.
-   In inbound transformer, set `send_prev_control` in result to true, previous control will be sent again. Use this method for Multi-Step controls.

Example script:

```
(function execute (inputs, outputs) {
  var result = {};
  var request_context = inputs.request_context;
  var typed_value = request_context ['typed_value'];
  if (typed_value.index0f("#") > -1)
    result["validation_message"] = "Invalid character, please don't enter special character '#'";
  result["value"] = typed_value;
  result["search_text"] = "";
  outputs.result - result;
})(inputs, outputs);
```

**Parent Topic:**[Supported Virtual Agent and Agent Chat features for custom chat integrations](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/conversational-interfaces/virtual-agent/va-features-custom-chat-integrations.md)