diff --git a/.gitignore b/.gitignore
index ea8c4bf..de231e1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
+/messages
 /target
diff --git a/src/model/sns.rs b/src/model/sns.rs
index 688cd25..d0f9bf0 100644
--- a/src/model/sns.rs
+++ b/src/model/sns.rs
@@ -4,7 +4,7 @@
 //! the AWS Documentation.
 //!
 //! [0]: https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 
 /// Union for all known SNS message types
 ///
@@ -24,7 +24,7 @@ pub enum Message {
 /// See also: [HTTP/HTTPS subscription confirmation JSON format][0]
 ///
 /// [0]: https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-subscription-confirmation-json
-#[derive(Deserialize)]
+#[derive(Deserialize, Serialize)]
 #[serde(rename_all = "PascalCase")]
 pub struct SubscriptionConfirmationMessage {
     #[serde(rename = "MessageId")]
@@ -46,7 +46,7 @@ pub struct SubscriptionConfirmationMessage {
 /// See also: [HTTP/HTTPS notification JSON format][0]
 ///
 /// [0]: https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-notification-json
-#[derive(Deserialize)]
+#[derive(Deserialize, Serialize)]
 #[serde(rename_all = "PascalCase")]
 pub struct NotificationMessage {
     #[serde(rename = "MessageId")]
@@ -67,7 +67,7 @@ pub struct NotificationMessage {
 /// See also: [HTTP/HTTPS unsubscribe confirmation JSON format][0]
 ///
 /// [0]: https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-unsubscribe-confirmation-json
-#[derive(Deserialize)]
+#[derive(Deserialize, Serialize)]
 #[serde(rename_all = "PascalCase")]
 pub struct UnsubscribeConfirmationMessage {
     #[serde(rename = "MessageId")]
diff --git a/src/sns/mod.rs b/src/sns/mod.rs
index fd8f639..f341775 100644
--- a/src/sns/mod.rs
+++ b/src/sns/mod.rs
@@ -2,8 +2,11 @@
 pub mod error;
 pub mod sig;
 
+use std::path::PathBuf;
+
 use log::{debug, error, info};
 use reqwest::Url;
+use serde::Serialize;
 
 use crate::model::sns::*;
 use error::SnsError;
@@ -29,6 +32,7 @@ pub async fn handle_unsubscribe(
     msg: UnsubscribeConfirmationMessage,
 ) -> Result<(), SnsError> {
     verify(&msg, &msg.signing_cert_url).await?;
+    save_message(&msg.topic_arn, &msg.timestamp, &msg.message_id, &msg);
     Ok(())
 }
 
@@ -38,6 +42,7 @@ pub async fn handle_unsubscribe(
 /// a file for later inspection.
 pub async fn handle_notify(msg: NotificationMessage) -> Result<(), SnsError> {
     verify(&msg, &msg.signing_cert_url).await?;
+    save_message(&msg.topic_arn, &msg.timestamp, &msg.message_id, &msg);
     Ok(())
 }
 
@@ -141,3 +146,51 @@ async fn confirm_subscription(msg: &SubscriptionConfirmationMessage) {
         }
     }
 }
+
+fn save_message<T: Serialize>(
+    topic: &str,
+    timestamp: &str,
+    msgid: &str,
+    msg: &T,
+) {
+    let mut path = PathBuf::from("messages");
+    path.push(topic);
+    if !path.is_dir() {
+        if let Err(e) = std::fs::create_dir_all(&path) {
+            error!("Could not create message storage directory: {}", e);
+            return;
+        }
+    }
+    path.push(format!("{}.{}", timestamp, msgid));
+    match serde_json::to_string(msg) {
+        Ok(data) => match std::fs::write(&path, &data) {
+            Ok(_) => info!(
+                "Wrote message {} to {}",
+                &msgid,
+                &path.to_string_lossy()
+            ),
+            Err(e) => error!("Could not save message: {}", e),
+        },
+        Err(e) => error!("Failed to serialize message: {}", e),
+    };
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_save_message() {
+        let msg = NotificationMessage {
+            message_id: "f0bc6e06-24d1-471d-a828-8411c9873996".into(),
+            topic_arn: "arn:aws:sns:us-east-2-566967686773:dchtest1".into(),
+            message: "Hello, world!".into(),
+            subject: None,
+            timestamp: "2022-09-05T214:29:34.232Z".into(),
+            signature_version: "0".into(),
+            signature: "".into(),
+            signing_cert_url: "".into(),
+        };
+        save_message(&msg.topic_arn, &msg.timestamp, &msg.message_id, &msg);
+    }
+}