diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 36957b0..c7cc410 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -16,10 +16,8 @@ class ApplicationController < ActionController::Base
   end
 
   def current_ability
-    if current_user
-      @current_ability ||= Ability.new(current_user)
-    elsif current_client
-      @current_ability ||= ClientAbility.new(current_client)
-    end
+    @current_ability ||=
+      current_client.try { |c| ClientAbility.new(c) } ||
+      Ability.new(current_user)
   end
 end
diff --git a/app/controllers/transactions_controller.rb b/app/controllers/transactions_controller.rb
index 7c1152f..7b5626d 100644
--- a/app/controllers/transactions_controller.rb
+++ b/app/controllers/transactions_controller.rb
@@ -1,4 +1,5 @@
 class TransactionsController < ApplicationController
+  load_and_authorize_resource
   skip_before_filter :verify_authenticity_token, only: :create
 
   before_action :authenticate_user!, except: :create
@@ -34,12 +35,14 @@ class TransactionsController < ApplicationController
 
   def transaction_params
     t = params.require(:transaction)
-          .permit(:debtor, :creditor, :amount, :message)
+          .permit(:debtor, :creditor, :message, :euros, :cents)
 
-    t.update({
+    {
       debtor: User.find_by(name: t[:debtor]) || User.zeus,
       creditor: User.find_by(name: t[:creditor]) || User.zeus,
-      issuer: current_client || current_user
-    })
+      issuer: current_client || current_user,
+      amount: (t[:euros].to_f*100 + t[:cents].to_f).to_i,
+      message: t[:message]
+    }
   end
 end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index f04be4f..c3a4c81 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -2,12 +2,10 @@ class Ability
   include CanCan::Ability
 
   def initialize(user)
-    user ||= User.new # guest user (not logged in)
+    return unless user
 
-    if user.penning?
-      can :manage, :all
-    else
-      can :read, user, id: user.id
-    end
+    can :manage, :all if user.penning?
+    can :read, user, id: user.id
+    can :create, Transaction, debtor: user
   end
 end
diff --git a/app/views/transactions/new.html.haml b/app/views/transactions/new.html.haml
index 742a465..91f158f 100644
--- a/app/views/transactions/new.html.haml
+++ b/app/views/transactions/new.html.haml
@@ -1,6 +1,9 @@
 = render 'partials/form_errors', object: @transaction
 = simple_form_for @transaction do |f|
-  = f.hidden_field :debtor, value: current_user.name
+  - if current_user.penning
+    = f.collection_select :debtor, User.all, :name, :name, {}, { class: 'select2-selector' }
+  - else
+    = f.hidden_field :debtor, value: current_user.name
   = f.collection_select :creditor, User.all, :name, :name, {}, { class: 'select2-selector' }
   = f.input :amount
   = f.input :message, required: true
diff --git a/spec/controllers/transactions_controller_spec.rb b/spec/controllers/transactions_controller_spec.rb
index 7ba1232..e96cc51 100644
--- a/spec/controllers/transactions_controller_spec.rb
+++ b/spec/controllers/transactions_controller_spec.rb
@@ -1,4 +1,5 @@
 require 'rails_helper'
+require 'spec_helper'
 
 RSpec.describe TransactionsController, type: :controller do
   describe "creating transaction" do
@@ -8,14 +9,70 @@ RSpec.describe TransactionsController, type: :controller do
       sign_in @debtor
     end
 
-    it "should create a valid transaction" do
-      expect do
-        put :create, { transaction: {
+    context "with valid attributes" do
+      before :each do
+        @attributes = { transaction: {
+          debtor: @debtor.name,
           creditor: @creditor.name,
-          amount: 20,
-          message: "hoi"
+          cents: 70,
+          message: 'hoi'
         }}
-      end.to change {Transaction.count}.by(1)
+        post :create, @attributes
+        @transaction = Transaction.last
+      end
+
+      it "should create a new transaction" do
+        expect {post :create, @attributes}.to change {Transaction.count}.by(1)
+      end
+
+      it "should set debtor" do
+        expect(@transaction.debtor).to eq(@debtor)
+      end
+
+      it "should set amount" do
+        expect(@transaction.amount).to eq(70)
+      end
+
+      it "should set creditor" do
+        expect(@transaction.creditor).to eq(@creditor)
+      end
+
+      it "should set issuer" do
+        expect(@transaction.issuer).to eq(@debtor)
+      end
+    end
+
+    context "with float euros" do
+      it "should set correct amount" do
+        post :create, transaction: {
+          debtor: @debtor.name,
+          creditor: @creditor.name,
+          euros: 10.5,
+          message: "Omdat je een leuke jongen bent!"
+        }
+        expect(Transaction.last.amount).to eq(1050)
+      end
+    end
+
+    context "with negative amount" do
+      it "should be refused" do
+        expect do
+          post :create, transaction: attributes_for(:transaction, cents: -20)
+        end.not_to change {Transaction.count}
+      end
+    end
+
+    context "for other user" do
+      it "should be refused" do
+        expect do
+          post :create, transaction: {
+            debtor: @creditor.name,
+            creditor: @debtor.name,
+            euros: 10000000,
+            message: 'DIT IS OVERVAL'
+          }
+        end.not_to change {Transaction.count}
+      end
     end
   end
 end
diff --git a/spec/helpers/transactions_helper_spec.rb b/spec/helpers/transactions_helper_spec.rb
index f29b78f..48c6c73 100644
--- a/spec/helpers/transactions_helper_spec.rb
+++ b/spec/helpers/transactions_helper_spec.rb
@@ -11,5 +11,4 @@ require 'rails_helper'
 #   end
 # end
 RSpec.describe TransactionsHelper, type: :helper do
-  pending "add some examples to (or delete) #{__FILE__}"
 end
diff --git a/spec/helpers/users_helper_spec.rb b/spec/helpers/users_helper_spec.rb
index b2e3444..890768c 100644
--- a/spec/helpers/users_helper_spec.rb
+++ b/spec/helpers/users_helper_spec.rb
@@ -11,5 +11,4 @@ require 'rails_helper'
 #   end
 # end
 RSpec.describe UsersHelper, type: :helper do
-  pending "add some examples to (or delete) #{__FILE__}"
 end