diff --git a/src/model/event.rs b/src/model/event.rs
index 5ef81e4..699f5e7 100644
--- a/src/model/event.rs
+++ b/src/model/event.rs
@@ -552,7 +552,7 @@ mod test {
 
         let trip_details = TripDetails::find_by_id(&pool, 1).await.unwrap();
 
-        let admin = EventUser::new(&pool, User::find_by_id(&pool, 1).await.unwrap())
+        let admin = EventUser::new(&pool, &User::find_by_id(&pool, 1).await.unwrap())
             .await
             .unwrap();
         Event::create(&pool, &admin, "new-event".into(), 2, false, &trip_details).await;
diff --git a/src/model/notification.rs b/src/model/notification.rs
index 1c74a1a..db51693 100644
--- a/src/model/notification.rs
+++ b/src/model/notification.rs
@@ -256,7 +256,7 @@ mod test {
         let trip_details = TripDetails::find_by_id(&pool, tripdetails_id)
             .await
             .unwrap();
-        let user = EventUser::new(&pool, User::find_by_id(&pool, 1).await.unwrap())
+        let user = EventUser::new(&pool, &User::find_by_id(&pool, 1).await.unwrap())
             .await
             .unwrap();
         Event::create(&pool, &user, "new-event".into(), 2, false, &trip_details).await;
@@ -269,7 +269,7 @@ mod test {
         UserTrip::create(&pool, &rower, &trip_details, None)
             .await
             .unwrap();
-        let cox = SteeringUser::new(&pool, User::find_by_name(&pool, "cox").await.unwrap())
+        let cox = SteeringUser::new(&pool, &User::find_by_name(&pool, "cox").await.unwrap())
             .await
             .unwrap();
         Trip::new_join(&pool, &cox, &event).await.unwrap();
@@ -284,7 +284,7 @@ mod test {
             is_locked: event.is_locked,
             trip_type_id: None,
         };
-        event.update(&pool, &cancel_update).await;
+        event.update(&pool, &user, &cancel_update).await;
 
         // Rower received notification
         let notifications = Notification::for_user(&pool, &rower).await;
@@ -314,12 +314,12 @@ mod test {
             is_locked: event.is_locked,
             trip_type_id: None,
         };
-        event.update(&pool, &update).await;
+        event.update(&pool, &user, &update).await;
         assert!(Notification::for_user(&pool, &rower).await.is_empty());
         assert!(Notification::for_user(&pool, &cox.user).await.is_empty());
 
         // Cancel event again
-        event.update(&pool, &cancel_update).await;
+        event.update(&pool, &user, &cancel_update).await;
 
         // Rower is removed if notification is accepted
         assert!(event.is_rower_registered(&pool, &rower).await);
diff --git a/src/model/trip.rs b/src/model/trip.rs
index 98dd878..36c0773 100644
--- a/src/model/trip.rs
+++ b/src/model/trip.rs
@@ -532,7 +532,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -549,7 +549,7 @@ mod test {
         let pool = testdb!();
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -558,7 +558,7 @@ mod test {
 
         let cox2 = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox2".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox2".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -587,7 +587,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox2".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox2".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -603,7 +603,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox2".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox2".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -620,7 +620,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -648,7 +648,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -676,7 +676,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox2".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox2".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -701,7 +701,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -724,7 +724,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -742,7 +742,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox2".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox2".into()).await.unwrap(),
         )
         .await
         .unwrap();
@@ -764,7 +764,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
diff --git a/src/model/user/mod.rs b/src/model/user/mod.rs
index 228f82e..707143f 100644
--- a/src/model/user/mod.rs
+++ b/src/model/user/mod.rs
@@ -27,6 +27,7 @@ use super::{
     Day,
 };
 use crate::{tera::admin::user::UserEditForm, AMOUNT_DAYS_TO_SHOW_TRIPS_AHEAD};
+use scheckbuch::ScheckbuchUser;
 
 mod fee;
 mod scheckbuch;
@@ -112,6 +113,8 @@ impl User {
                 .await?;
         } else if self.has_role(db, "schnupperant").await {
             self.send_welcome_mail_schnupper(db, mail, smtp_pw).await?;
+        } else if let Some(scheckbuch) = ScheckbuchUser::new(db, &self).await {
+            scheckbuch.notify(db, mail, smtp_pw).await?;
         } else {
             return Err(format!(
                 "Could not send welcome mail, because user {} is not in Donau Linz or scheckbuch or schnupperant group",
@@ -259,7 +262,7 @@ ASKÖ Ruderverein Donau Linz", self.name),
     }
 
     pub async fn allowed_to_update_always_show_trip(&self, db: &SqlitePool) -> bool {
-        AllowedToUpdateTripToAlwaysBeShownUser::new(db, self.clone())
+        AllowedToUpdateTripToAlwaysBeShownUser::new(db, &self)
             .await
             .is_some()
     }
@@ -989,9 +992,9 @@ macro_rules! special_user {
         }
 
         impl $name {
-            pub async fn new(db: &SqlitePool, user: User) -> Option<Self> {
+            pub async fn new(db: &SqlitePool, user: &User) -> Option<Self> {
                 if special_user!(@check_roles user, db, $($role)*) {
-                    Some($name { user })
+                    Some($name { user: user.clone() })
                 } else {
                     None
                 }
diff --git a/src/model/user/scheckbuch.rs b/src/model/user/scheckbuch.rs
index 033b6a3..3fc04fe 100644
--- a/src/model/user/scheckbuch.rs
+++ b/src/model/user/scheckbuch.rs
@@ -30,16 +30,23 @@ impl ScheckbuchUser {
         user.add_role(db, &scheckbuch).await.unwrap();
 
         // TODO: remove all other `membership_type` roles
+        let new_user = Self::new(db, &user).await.unwrap();
 
-        let new_user = Self::new(db, user).await.unwrap();
+        new_user.notify(db, mail, smtp_pw).await
+    }
 
-        new_user
-            .send_welcome_mail_to_user(db, mail, smtp_pw)
-            .await?;
-        new_user.notify_coxes_about_new_scheckbuch(db).await;
+    pub(crate) async fn notify(
+        &self,
+        db: &SqlitePool,
+        mail: &str,
+        smtp_pw: &str,
+    ) -> Result<(), String> {
+        self.send_welcome_mail_to_user(db, mail, smtp_pw).await?;
+        self.notify_coxes_about_new_scheckbuch(db).await;
 
         Ok(())
     }
+
     async fn send_welcome_mail_to_user(
         &self,
         db: &SqlitePool,
diff --git a/src/model/usertrip.rs b/src/model/usertrip.rs
index 9f14ba6..c58f078 100644
--- a/src/model/usertrip.rs
+++ b/src/model/usertrip.rs
@@ -197,7 +197,7 @@ impl UserTrip {
         let mut add_info = "";
         if let Some(trip) = &trip_to_delete {
             let cox = User::find_by_id(db, trip.cox_id as i32).await.unwrap();
-            trip.delete(db, &SteeringUser::new(db, cox).await.unwrap())
+            trip.delete(db, &SteeringUser::new(db, &cox).await.unwrap())
                 .await
                 .unwrap();
             add_info = " Das war die letzte angemeldete Person. Nachdem nun alle Bescheid wissen, wird die Ausfahrt ab sofort nicht mehr angezeigt.";
@@ -355,7 +355,7 @@ mod test {
 
         let cox = SteeringUser::new(
             &pool,
-            User::find_by_name(&pool, "cox".into()).await.unwrap(),
+            &User::find_by_name(&pool, "cox".into()).await.unwrap(),
         )
         .await
         .unwrap();
diff --git a/src/tera/admin/user.rs b/src/tera/admin/user.rs
index 192560b..fe4e607 100644
--- a/src/tera/admin/user.rs
+++ b/src/tera/admin/user.rs
@@ -60,7 +60,7 @@ async fn index(
         .collect();
 
     let user: User = user.into_inner();
-    let allowed_to_edit = ManageUserUser::new(db, user.clone()).await.is_some();
+    let allowed_to_edit = ManageUserUser::new(db, &user).await.is_some();
 
     let users: Vec<UserWithRolesAndMembershipPdf> = join_all(user_futures).await;
 
@@ -94,7 +94,7 @@ async fn index_admin(
     let users: Vec<UserWithRolesAndMembershipPdf> = join_all(user_futures).await;
 
     let user: User = user.user;
-    let allowed_to_edit = ManageUserUser::new(db, user.clone()).await.is_some();
+    let allowed_to_edit = ManageUserUser::new(db, &user).await.is_some();
 
     let roles = Role::all(db).await;
     let families = Family::all_with_members(db).await;
diff --git a/src/tera/log.rs b/src/tera/log.rs
index 6269819..1f33e3a 100644
--- a/src/tera/log.rs
+++ b/src/tera/log.rs
@@ -296,7 +296,7 @@ async fn create_kiosk(
     create_logbook(
         db,
         data,
-        &DonauLinzUser::new(db, creator).await.unwrap(),
+        &DonauLinzUser::new(db, &creator).await.unwrap(),
         &config.smtp_pw,
     )
     .await
@@ -390,7 +390,7 @@ async fn home_kiosk(
         logbook_id,
         &DonauLinzUser::new(
             db,
-            User::find_by_id(db, logbook.shipmaster as i32)
+            &User::find_by_id(db, logbook.shipmaster as i32)
                 .await
                 .unwrap(),
         )