---
title: "Identity Developer Documentation"
slug: "identity-developer-documentation-help-home"
updated: 2025-10-31T18:48:03Z
published: 2025-10-31T18:48:03Z
canonical: "help.yahooinc.com/identity-developer-documentation-help-home"
---

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

# Identity Developer Documentation

Yahoo Identity Developer Documentation is a resource hub describing steps to activate and integrate various identifiers that are not device specific for the purpose of conversion tracking and optimization on Yahoo DSP.

Yahoo DSP supports these identifiers.

- Hashed Email Address
- Hashed Phone Number
- Partner Match ID (PXID)
- Click ID (vmcid)

> [!WARNING]
> Important
> 
> Enhanced Attribution adheres to all privacy regulations because the click event is not tied back to a user but instead only connects the conversion to a click event.