diff --git a/app/models/memberships/join_zusatzsektion.rb b/app/models/memberships/join_zusatzsektion.rb
index 7eb163c72..e40fe3910 100644
--- a/app/models/memberships/join_zusatzsektion.rb
+++ b/app/models/memberships/join_zusatzsektion.rb
@@ -22,8 +22,30 @@ def affected_people
       sac_family_membership? ? super : [person]
     end
 
+    def save!
+      generate_invoice(roles.first) unless confirmation_needed?
+
+      super
+    end
+
     private
 
+    def confirmation_needed?
+      group_for_neuanmeldung.is_a?(Group::SektionsNeuanmeldungenSektion)
+    end
+
+    def generate_invoice(role)
+      invoice = ExternalInvoice::SacMembership.create!(
+        person: role.person,
+        state: :draft,
+        year: Date.current.year,
+        issued_at: Date.current,
+        sent_at: Date.current,
+        link: role.layer_group
+      )
+      Invoices::Abacus::CreateMembershipInvoiceJob.new(invoice, Date.current, new_entry: false).enqueue!
+    end
+
     def prepare_roles(person)
       group_for_neuanmeldung.roles.build(
         person: person,
diff --git a/spec/models/memberships/join_zusatzsektion_spec.rb b/spec/models/memberships/join_zusatzsektion_spec.rb
index 8dce4c82f..d9885085c 100644
--- a/spec/models/memberships/join_zusatzsektion_spec.rb
+++ b/spec/models/memberships/join_zusatzsektion_spec.rb
@@ -154,15 +154,15 @@ def create_role(key, role, owner: person, **attrs)
           ActiveRecord::Base.transaction do
             expect(join_sektion).to be_valid
             expect { join_sektion.save! }.to change { person.reload.roles.count }.by(1)
-                                         .and not_change { ExternalInvoice::SacMembership.count }
-                                         .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
+              .and not_change { ExternalInvoice::SacMembership.count }
+              .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
           end
         end
 
         it "prefers to create role in NeuanmeldungenSektion group" do
           expect { join_sektion.save! }.to change { person.reload.roles.count }.by(1)
-                                       .and not_change { ExternalInvoice::SacMembership.count }
-                                       .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
+            .and not_change { ExternalInvoice::SacMembership.count }
+            .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
           expect(role.group).to eq groups(:matterhorn_neuanmeldungen_sektion)
           expect(role.type).to eq "Group::SektionsNeuanmeldungenSektion::NeuanmeldungZusatzsektion"
         end
@@ -170,8 +170,8 @@ def create_role(key, role, owner: person, **attrs)
         it "falls back to create role in NeuanmeldungenSektionNv group" do
           groups(:matterhorn_neuanmeldungen_sektion).destroy
           expect { join_sektion.save! }.to change { person.reload.roles.count }.by(1)
-                                       .and change { ExternalInvoice::SacMembership.count }.by(1)
-                                       .and change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }.by(1)
+            .and change { ExternalInvoice::SacMembership.count }.by(1)
+            .and change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }.by(1)
           expect(role.group).to eq groups(:matterhorn_neuanmeldungen_nv)
           expect(role.type).to eq "Group::SektionsNeuanmeldungenNv::NeuanmeldungZusatzsektion"
         end
@@ -185,16 +185,16 @@ def create_role(key, role, owner: person, **attrs)
           neuanmeldungen = Fabricate(Group::SektionsNeuanmeldungenSektion.sti_name,
             parent: sektion)
           expect { join_sektion.save! }.to change { person.reload.roles.count }.by(1)
-                                       .and not_change { ExternalInvoice::SacMembership.count }
-                                       .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
+            .and not_change { ExternalInvoice::SacMembership.count }
+            .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
           expect(role.group).to eq neuanmeldungen
           expect(role.type).to eq "Group::SektionsNeuanmeldungenSektion::NeuanmeldungZusatzsektion"
         end
 
         it "falls back to create role in NeuanmeldungenSektionNv group" do
           expect { join_sektion.save! }.to change { person.reload.roles.count }.by(1)
-                                       .and change { ExternalInvoice::SacMembership.count }.by(1)
-                                       .and change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }.by(1)
+            .and change { ExternalInvoice::SacMembership.count }.by(1)
+            .and change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }.by(1)
           expect(role.group).to eq groups(:bluemlisalp_ortsgruppe_ausserberg_neuanmeldungen_nv)
           expect(role.type).to eq "Group::SektionsNeuanmeldungenNv::NeuanmeldungZusatzsektion"
         end
@@ -241,8 +241,8 @@ def create_sac_family(person, *others)
           expect do
             expect(join_sektion.save!).to eq true
           end.to change { Role.count }.by(2)
-             .and not_change { ExternalInvoice::SacMembership.count }
-             .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
+            .and not_change { ExternalInvoice::SacMembership.count }
+            .and not_change { Delayed::Job.where("handler like '%CreateMembershipInvoiceJob%'").count }
           expect(role.beitragskategorie).to eq "family"
           expect(role(other).beitragskategorie).to eq "family"
         end