---
title: Autocomplete deactivation
---

> Agent instructions:
> **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown.
>
> - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version.
> - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt).

Autocomplete is a feature, which **remembers submitted user names** in login forms and also all words submitted through any forms in the system. In this topic though, we will focus only on the autocomplete functionality in login forms:

![Autocomplete in a login form](https://docs.kentico.com/docsassets/k81/autocomplete-deactivation/Autocomplete.png "Autocomplete in a login form")

When users try to log in using a form, the autocomplete feature provides them with a list of already remembered user names. This is convenient for the users in many ways:

- The users do not have to type the whole user name every time they want to log in.
- If the users forget their user names, this feature can help them log in.
- It reduces discomfort of having to type the user names repeatedly on mobile devices.

However, using the autocomplete can pose a **security risk**. A malicious user who obtains user names from the autocomplete feature may gain access to the users' accounts, for example using a dictionary attack. Thus, you should always consider the damage a malicious user can do to the users' accounts. This threat mainly depends on the type of application you are creating and how this application will be used (on private computers only or in public places like schools, libraries, etc.).

You should disable autocomplete in applications working with:

- bank accounts,
- social media,
- sensitive information.

On the other hand, autocomplete can be useful in applications like:

- intranet,
- interest and hobby forums.

## Disabling autocomplete

Autocomplete functionality can be disabled for the login forms using a HTML attribute:

```html

<input name="Login1$UserName" class="LogonTextBox" id="Login1_UserName" type="text" maxlength="100" autocomplete="Off" />

```

In Kentico, you can use the following setting to disable autocomplete in login forms:

- In **Settings -> Security & Membership -> Protection** uncheck the **Enable Autocomplete** option.