---
title: "Custom Visitor Id"
slug: "custom-visitor-id"
updated: 2024-03-14T06:45:03Z
published: 2024-03-14T06:45:03Z
canonical: "docs.mapp.com/custom-visitor-id"
---

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

# Custom Visitor Id

**Shows a unique visitor id (customer ID), that is usually submitted at login.**

In most cases this is a hashed email address.

This information is submitted to Mapp Intelligence in the parameter "cd".