# HTTP/HTTPS unsubscribe confirmation JSON format
<a name="http-unsubscribe-confirmation-json"></a>

After an HTTP/HTTPS endpoint is unsubscribed from a topic, Amazon SNS sends an unsubscribe confirmation message to the endpoint.

The unsubscribe confirmation message is a POST message with a message body that contains a JSON document with the following name-value pairs.

**`Type`**  
The type of message. For a unsubscribe confirmation, the type is `UnsubscribeConfirmation`.

**`MessageId`**  
A Universally Unique Identifier (UUID), unique for each message published. For a message that Amazon SNS resends during a retry, the message ID of the original message is used.

**`Token`**  
A value you can use with the [https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html](https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html) action to re-confirm the subscription. Alternatively, you can simply visit the `SubscribeURL`.

**`TopicArn`**  
The Amazon Resource Name (ARN) for the topic that this endpoint has been unsubscribed from.

**`Message`**  
A string that describes the message. For unsubscribe confirmation, this string looks like this:  

```
You have chosen to deactivate subscription arn:aws:sns:us-east-2:123456789012:MyTopic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55.\nTo cancel this operation and restore the subscription, visit the SubscribeURL included in this message.
```

**`SubscribeURL`**  
The URL that you must visit in order to re-confirm the subscription. Alternatively, you can instead use the `Token` with the [https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html](https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html) action to re-confirm the subscription.

**`Timestamp`**  
The time (GMT) when the unsubscribe confirmation was sent.

**`SignatureVersion`**  
Version of the Amazon SNS signature used.  
+ If the `SignatureVersion` is **1**, `Signature` is a Base64-encoded `SHA1withRSA` signature of the `Message`, `MessageId`, `Type`, `Timestamp`, and `TopicArn` values.
+ If the `SignatureVersion` is **2**, `Signature` is a Base64-encoded `SHA256withRSA` signature of the `Message`, `MessageId`, `Type`, `Timestamp`, and `TopicArn` values.

**`Signature`**  
Base64-encoded `SHA1withRSA` or `SHA256withRSA` signature of the `Message`, `MessageId`, `Type`, `Timestamp`, and `TopicArn` values.

**`SigningCertURL`**  
The URL to the certificate that was used to sign the message.

The following HTTP POST message is an example of a `UnsubscribeConfirmation` message to an HTTP endpoint.

```
POST / HTTP/1.1
x-amz-sns-message-type: UnsubscribeConfirmation
x-amz-sns-message-id: 47138184-6831-46b8-8f7c-afc488602d7d
x-amz-sns-topic-arn: arn:aws:sns:us-west-2:123456789012:MyTopic
x-amz-sns-subscription-arn: arn:aws:sns:us-west-2:123456789012:MyTopic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55
Content-Length: 1399
Content-Type: text/plain; charset=UTF-8
Host: myhost.example.com
Connection: Keep-Alive
User-Agent: Amazon Simple Notification Service Agent

{
  "Type" : "UnsubscribeConfirmation",
  "MessageId" : "47138184-6831-46b8-8f7c-afc488602d7d",
  "Token" : "2336412f37...",
  "TopicArn" : "arn:aws:sns:us-west-2:123456789012:MyTopic",
  "Message" : "You have chosen to deactivate subscription arn:aws:sns:us-west-2:123456789012:MyTopic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55.\nTo cancel this operation and restore the subscription, visit the SubscribeURL included in this message.",
  "SubscribeURL" : "https://sns.us-west-2.amazonaws.com/?Action=ConfirmSubscription&TopicArn=arn:aws:sns:us-west-2:123456789012:MyTopic&Token=2336412f37fb6...",
  "Timestamp" : "2012-04-26T20:06:41.581Z",
  "SignatureVersion" : "1",
  "Signature" : "EXAMPLEHXgJm...",
  "SigningCertURL" : "https://sns.us-west-2.amazonaws.com/SimpleNotificationService-f3ecfb7224c7233fe7bb5f59f96de52f.pem"
}
```