> ## Documentation Index
> Fetch the complete documentation index at: https://docs.invoca.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Correct Revenue Values to Zero

> Use `null` rather than zero when correcting a revenue value, and make sure you're not mixing multiple Signal partner IDs.

**Applies to:** Signal API

## Objective

Adjust or correct the value of a transaction down to zero.

## Answer

When correcting to zero, it's often more useful to send `null` instead. If you want the revenue to aggregate, include a unique `partner_unique_id` with each revenue value sent — those values will then combine into a total revenue amount.

When building your Signal API requests, avoid using multiple Signal partner IDs if you're trying to correct a revenue value, since that will prevent the correction from applying as expected.

## Where to go next

* [Transactions API: Programmatic Data Access](/s/article/transactions-api-programmatic-data-access)
* [Applying Signals and Marketing Data to Multiple Calls With the Signal API](/s/article/apply-signals-marketing-data-multiple-calls-signal-api)