# AWS Service Catalog Notification Constraints
<a name="constraints-notification"></a>

**Note**  
AWS Service Catalog does not support notification constraints for Terraform Open Source or Terraform Cloud products. 

A notification constraint specifies an Amazon SNS topic to receive notifications about stack events. 

Use the following procedure to create an SNS topic and subscribe to it.

**To create an SNS topic and a subscription**

1. Open the Amazon SNS console at [https://console.aws.amazon.com/sns/v3/home](https://console.aws.amazon.com/sns/v3/home).

1. Choose **Create topic**.

1. Type a topic name and then choose **Create topic**.

1. Choose **Create subscription**.

1. For **Protocol**, select **Email**. For **Endpoint**, type an email address that you can use to receive notifications. Choose **Create subscription**.

1. You'll receive a confirmation email with the subject line `AWS Notification - Subscription Confirmation`. Open the email and follow the directions to complete your subscription.

Use the following procedure to apply a notification constraint using the SNS topic that you created using the previous procedure.

**To apply a notification constraint to a product**

1. Open the Service Catalog console at [https://console.aws.amazon.com/servicecatalog/](https://console.aws.amazon.com/servicecatalog/).

1. Choose the portfolio that contains the product.

1. Expand **Constraints** and choose **Add constraints**.

1. Choose the product from **Product** and set **Constraint type** to **Notification**. Choose **Continue**.

1. Choose **Choose a topic from your account** and select the SNS topic that you created from **Topic Name**.

1. Choose **Submit**.