# Signed up

Learn how to check if a user has signed up.

This expression verifies whether the user has signed up based on [Signed up](/reference/event/types/user-account/user-signed-up) events. Sign‑ups represent successful account creation.

> **Tracking required**
>
> Make sure your app is tracking the [Signed up](/reference/event/types/user-account/user-signed-up) event before using this expression. Without this event, the expression will always evaluate to false.

## Syntax

The basic syntax for this expression is:

```cql
user has signed up
```

The negation of the expression can be expressed as:

```cql
user has not signed up
```

You can refine the expression with quantifiers, and time windows:

```cql
user has signed up with /*<quantifier>*/ /*<window>*/
```

## Parameters

These are the supported parameters:

- `quantifier`: [`Quantifier`](/reference/cql/expressions/events/quantifier) (optional)

  A quantifier to specify how many times the sign up must have occurred.

- `window`: [`TimeWindow`](/reference/cql/expressions/events/time-window) (optional)

  The time window during which the sign up must have occurred.

## Event properties

This event does not have any specific properties for filtering.

## Examples

You can check whether a user has signed up:

```cql
user has signed up
```

Or check if they have not:

```cql
user has not signed up
```

You can also check how many times a user has signed up:

```cql
user has signed up at least 2 times
```

You can even filter by time, such as checking if a sign‑up happened yesterday:

```cql
user has signed up yesterday
```

Combine quantifiers and time-based conditions:

```cql
user has signed up at least 2 times this month
```

> **Scale plan**
>
> This feature is available only to accounts on the Scale plan. See the [pricing page](https://croct.com/pricing) for more information.

## Explore

- [Audiences](/explanation/audience): Understand how to delivery content to specific groups of users.
- [Event tracking](/reference/event/types/user-account/user-signed-up): Learn how to track this event.