diff --git a/matrix_sdk/examples/emoji_verification.rs b/matrix_sdk/examples/emoji_verification.rs
index 967154f4..4ff70983 100644
--- a/matrix_sdk/examples/emoji_verification.rs
+++ b/matrix_sdk/examples/emoji_verification.rs
@@ -129,7 +129,7 @@ async fn login(
                                     if let MessageType::VerificationRequest(_) = &m.content.msgtype
                                     {
                                         let request = client
-                                            .get_verification_request(&m.event_id)
+                                            .get_verification_request(&m.sender, &m.event_id)
                                             .await
                                             .expect("Request object wasn't created");
 
diff --git a/matrix_sdk/src/client.rs b/matrix_sdk/src/client.rs
index a5efaf9d..2f449684 100644
--- a/matrix_sdk/src/client.rs
+++ b/matrix_sdk/src/client.rs
@@ -2192,16 +2192,18 @@ impl Client {
             .map(|sas| Sas { inner: sas, client: self.clone() })
     }
 
-    /// Get a `VerificationRequest` object with the given flow id.
+    /// Get a `VerificationRequest` object for the given user with the given
+    /// flow id.
     #[cfg(feature = "encryption")]
     #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
     pub async fn get_verification_request(
         &self,
+        user_id: &UserId,
         flow_id: impl AsRef<str>,
     ) -> Option<VerificationRequest> {
         let olm = self.base_client.olm_machine().await?;
 
-        olm.get_verification_request(flow_id)
+        olm.get_verification_request(user_id, flow_id)
             .map(|r| VerificationRequest { inner: r, client: self.clone() })
     }
 
diff --git a/matrix_sdk_crypto/src/machine.rs b/matrix_sdk_crypto/src/machine.rs
index 258c61b1..5b1cfa00 100644
--- a/matrix_sdk_crypto/src/machine.rs
+++ b/matrix_sdk_crypto/src/machine.rs
@@ -725,9 +725,10 @@ impl OlmMachine {
     /// Get a verification request object with the given flow id.
     pub fn get_verification_request(
         &self,
+        user_id: &UserId,
         flow_id: impl AsRef<str>,
     ) -> Option<VerificationRequest> {
-        self.verification_machine.get_request(flow_id)
+        self.verification_machine.get_request(user_id, flow_id)
     }
 
     async fn update_one_time_key_count(&self, key_count: &BTreeMap<DeviceKeyAlgorithm, UInt>) {
diff --git a/matrix_sdk_crypto/src/verification/machine.rs b/matrix_sdk_crypto/src/verification/machine.rs
index b8b21200..5478a16e 100644
--- a/matrix_sdk_crypto/src/verification/machine.rs
+++ b/matrix_sdk_crypto/src/verification/machine.rs
@@ -40,7 +40,7 @@ pub struct VerificationMachine {
     private_identity: Arc<Mutex<PrivateCrossSigningIdentity>>,
     pub(crate) store: Arc<dyn CryptoStore>,
     verifications: VerificationCache,
-    requests: Arc<DashMap<String, VerificationRequest>>,
+    requests: Arc<DashMap<UserId, DashMap<String, VerificationRequest>>>,
 }
 
 impl VerificationMachine {
@@ -91,8 +91,19 @@ impl VerificationMachine {
         Ok((sas, request))
     }
 
-    pub fn get_request(&self, flow_id: impl AsRef<str>) -> Option<VerificationRequest> {
-        self.requests.get(flow_id.as_ref()).map(|s| s.clone())
+    pub fn get_request(
+        &self,
+        user_id: &UserId,
+        flow_id: impl AsRef<str>,
+    ) -> Option<VerificationRequest> {
+        self.requests.get(user_id).and_then(|v| v.get(flow_id.as_ref()).map(|s| s.clone()))
+    }
+
+    fn insert_request(&self, request: VerificationRequest) {
+        self.requests
+            .entry(request.other_user().to_owned())
+            .or_insert_with(DashMap::new)
+            .insert(request.flow_id().as_str().to_owned(), request);
     }
 
     pub fn get_verification(&self, user_id: &UserId, flow_id: &str) -> Option<Verification> {
@@ -145,7 +156,10 @@ impl VerificationMachine {
     }
 
     pub fn garbage_collect(&self) {
-        self.requests.retain(|_, r| !(r.is_done() || r.is_cancelled()));
+        for user_verification in self.requests.iter() {
+            user_verification.retain(|_, v| !(v.is_done() || v.is_cancelled()));
+        }
+        self.requests.retain(|_, v| !v.is_empty());
 
         for request in self.verifications.garbage_collect() {
             self.verifications.add_request(request)
@@ -234,8 +248,7 @@ impl VerificationMachine {
                                     r,
                                 );
 
-                                self.requests
-                                    .insert(request.flow_id().as_str().to_owned(), request);
+                                self.insert_request(request);
                             } else {
                                 trace!(
                                     sender = event.sender().as_str(),
@@ -260,7 +273,7 @@ impl VerificationMachine {
                     }
                 }
                 AnyVerificationContent::Cancel(c) => {
-                    if let Some(verification) = self.get_request(flow_id.as_str()) {
+                    if let Some(verification) = self.get_request(event.sender(), flow_id.as_str()) {
                         verification.receive_cancel(event.sender(), c);
                     }
 
@@ -270,7 +283,7 @@ impl VerificationMachine {
                     }
                 }
                 AnyVerificationContent::Ready(c) => {
-                    if let Some(request) = self.requests.get(flow_id.as_str()) {
+                    if let Some(request) = self.get_request(event.sender(), flow_id.as_str()) {
                         if request.flow_id() == &flow_id {
                             request.receive_ready(event.sender(), c);
                         } else {
@@ -279,7 +292,7 @@ impl VerificationMachine {
                     }
                 }
                 AnyVerificationContent::Start(c) => {
-                    if let Some(request) = self.requests.get(flow_id.as_str()) {
+                    if let Some(request) = self.get_request(event.sender(), flow_id.as_str()) {
                         if request.flow_id() == &flow_id {
                             request.receive_start(event.sender(), c).await?
                         } else {
@@ -345,7 +358,7 @@ impl VerificationMachine {
                     }
                 }
                 AnyVerificationContent::Done(c) => {
-                    if let Some(verification) = self.get_request(flow_id.as_str()) {
+                    if let Some(verification) = self.get_request(event.sender(), flow_id.as_str()) {
                         verification.receive_done(event.sender(), c);
                     }