diff --git a/app/assets/javascripts/components/transaction_form.jsx.coffee b/app/assets/javascripts/components/transaction_form.jsx.coffee
index 1a54e1c..2aa6c24 100644
--- a/app/assets/javascripts/components/transaction_form.jsx.coffee
+++ b/app/assets/javascripts/components/transaction_form.jsx.coffee
@@ -1,4 +1,4 @@
-{ button, div, h3, input, option, select } = React.DOM
+{ button, div, form, h3, input, option, select } = React.DOM
 
 Action = React.createFactory React.createClass
   buttonClass: (b) ->
@@ -22,23 +22,21 @@ Amount = React.createFactory React.createClass
     @props.setAmount ref.target.value
   format: (ref) ->
     t = ref.target
-    t.value = parseFloat(t.value).toFixed(2)
+    t.value = parseFloat(t.value).toFixed(2) if t.value
   render: ->
     div className: 'row',
       div className: 'col-xs-4',
         div className: 'input-group',
           div className: 'input-group-addon', '€'
           input {
-            type: 'number',
             className: 'form-control input-lg',
-            placeholder: '0.00',
+            name: 'transaction[euros]'
+            onBlur: @format,
             onChange: @onChange,
-            onBlur: @format
+            placeholder: '0.00',
+            type: 'number',
           }
 
-Suggestions = React.createFactory React.createClass
-  render: ->
-
 Peer = React.createFactory React.createClass
   onChange: (ref) ->
     @props.setPeer ref.target.value
@@ -62,7 +60,13 @@ Peer = React.createFactory React.createClass
     div className: 'row',
       div className: 'col-xs-4',
         div className: 'suggestions-wrapper',
-          input type: 'text', className: @inputClass(options.length), onChange: @onChange, placeholder: 'Zeus member', value: (@props.peer || '')
+          input {
+            className: @inputClass(options.length),
+            onChange: @onChange,
+            placeholder: 'Zeus member',
+            type: 'text',
+            value: (@props.peer || '')
+          }
           if options.length != 0
             div className: 'suggestions',
               @options().map (s, i) =>
@@ -75,53 +79,135 @@ Message = React.createFactory React.createClass
   render: ->
     div className: 'row',
       div className: 'col-xs-8',
-        input type: 'text', className: 'form-control input-lg', onChange: @onChange, placeholder: 'Message'
+        input {
+          className: 'form-control input-lg',
+          name: 'transaction[message]',
+          onChange: @onChange,
+          placeholder: 'Message'
+          type: 'text',
+        }
 
 Submit = React.createFactory React.createClass
   render: ->
+    { onClick } = @props
     div className: 'row',
       div className: 'col-xs-4 col-xs-offset-4',
-        button type: 'submit', onClick: @props.onClick, className: 'btn btn-default btn-lg form-control', 'Confirm'
+        button {
+          className: 'btn btn-default btn-lg btn-block',
+          onClick: onClick,
+          type: 'submit',
+        }, 'Confirm'
 
 Step = React.createFactory React.createClass
   render: ->
+    { error } = @props
     div className: 'form-step',
       div className: 'form-step-counter', @props.step
       div className: 'form-step-content',
-        div className: 'form-step-title', @props.title
+        div className: 'form-step-title',
+          @props.title,
+          div className: 'form-step-error',
+            error
         div className: 'clear-both'
         @props.children
       div className: 'clear-both'
 
 @TransactionForm = React.createClass
   getInitialState: ->
-    giving: null, amount: null, peer: null, message: null
+    step: 1, giving: null, amount: null, peer: null, message: null
   setAction: (b) ->
     @setState giving: b
+    @setState step: 2 unless @state.step > 1
   setAmount: (a) ->
     @setState amount: a
+    @setState step: 3 unless @state.step > 2
   setPeer: (p) ->
     @setState peer: p
+    @setState step: 4 unless @state.step > 3
   setMessage: (m) ->
     @setState message: m
+    @setState step: 5 unless @state.step > 4
   submit: (e) ->
-    console.log 'submit'
-  render: ->
+    e.preventDefault()
+
+    { giving, peer } = @state
+    { user }         = @props
+
+    errors = @errors()
+    if Object.keys(errors).length != 0
+      return
+
+    if giving
+      debtor   = user.name
+      creditor = peer
+    else
+      debtor   = peer
+      creditor = user.name
+
+    $('<input />')
+      .attr('name', 'transaction[debtor]')
+      .attr('value', debtor)
+      .attr('type', 'hidden')
+      .appendTo(@refs.form)
+    $('<input />')
+      .attr('name', 'transaction[creditor]')
+      .attr('value', creditor)
+      .attr('type', 'hidden')
+      .appendTo(@refs.form)
+
+    @refs.form.submit()
+  errors: ->
     { amount, giving, message, peer } = @state
-    { peers }                         = @props
+    { peers, user }                   = @props
+
+    errors = {}
+
+    errors['giving'] = 'Please select an action.' unless giving != null
+
+    unless amount
+      errors['amount'] = 'Please fill in an amount.'
+    else if parseFloat(amount) <=  0
+      errors['amount'] = 'Please fill in a positive number.'
+
+    unless message && message != ""
+      errors['message'] = 'Please fill in a message.'
+
+    unless peer && peers.includes(peer) && peer != user
+      errors['peer'] = 'Please select a valid Zeus member.'
+
+    errors
+  render: ->
+    { step, amount, giving, message, peer } = @state
+    { peers }                               = @props
+
+    errors = @errors()
+
     div id: 'transaction-form',
       h3 null, 'Transfer some money'
-      Step step: 1, title: 'What do you want to do?',
-        Action giving: giving, setAction: @setAction
-      if giving != null
-        Step step: 2, title: 'How much do you want to give?',
-          Amount setAmount: @setAmount
-      if amount != null
-        Step step: 3, title: 'Who do you want to give it to?',
-          Peer peer: peer, peers: peers, setPeer: @setPeer
-      if peer != null
-        Step step: 4, title: 'Why do you want to give this?',
-          Message setMessage: @setMessage
-      if message != null
-        Submit null
+      form ref: 'form', action: '/transactions', acceptCharset: 'UTF-8', method: 'post',
+        Step step: 1, title: 'What do you want to do?',
+          Action giving: giving, setAction: @setAction
+        if step >= 2
+          Step {
+            step: 2,
+            title: "How much do you want to #{if giving then 'give' else 'receive'}?",
+            error: errors['amount'] if step > 2
+          },
+            Amount setAmount: @setAmount
+        if step >= 3
+          Step {
+            step: 3,
+            title: "Who do you want to #{if giving then 'give it to' else 'receive it from'}?",
+            error: errors['peer'] if step > 3
+          },
+            Peer peer: peer, peers: peers, setPeer: @setPeer
+        if step >= 4
+          Step {
+            step: 4,
+            title: "Why do you want to #{if giving then 'give' else 'receive'} this?",
+            error: errors['message'] if step > 4
+          },
+            Message setMessage: @setMessage
+        if step >= 5
+          Submit onClick: @submit
       div className: 'clear-both'
diff --git a/app/assets/stylesheets/transaction_form.scss b/app/assets/stylesheets/transaction_form.scss
index 3617b15..e92de6e 100644
--- a/app/assets/stylesheets/transaction_form.scss
+++ b/app/assets/stylesheets/transaction_form.scss
@@ -31,7 +31,13 @@ $step-width: 26px;
       .form-step-title {
         display: inline-block;
         font-weight: bold;
-        margin-bottom: 10px;
+        margin-bottom: 5px;
+      }
+
+      .form-step-error {
+        color: red;
+        font-size: 11px;
+        height: 15px;
       }
 
       .form-options {
diff --git a/app/controllers/concerns/transactions_query.rb b/app/controllers/concerns/transactions_query.rb
index bd87edc..2311809 100644
--- a/app/controllers/concerns/transactions_query.rb
+++ b/app/controllers/concerns/transactions_query.rb
@@ -6,7 +6,7 @@ class TransactionsQuery
     @transactions = Arel::Table.new(:transactions)
     @perspectived = Arel::Table.new(:perspectived_transactions)
     @peers = Arel::Table.new(:users).alias('peers')
-    @arel_table = Arel::Table.new(@user.name.concat('_transactions'))
+    @arel_table = Arel::Table.new("#{@user.name}_transactions")
   end
 
   def query
diff --git a/app/controllers/transactions_controller.rb b/app/controllers/transactions_controller.rb
index d4d1a45..4227c7e 100644
--- a/app/controllers/transactions_controller.rb
+++ b/app/controllers/transactions_controller.rb
@@ -10,21 +10,21 @@ class TransactionsController < ApplicationController
     @transaction = Transaction.new(transaction_params)
     @transaction.reverse if @transaction.amount < 0
 
-    if can? :create, @transaction
-      if @transaction.save
-        render json: @transaction, status: :created
-      else
-        render json: @transaction.errors.full_messages,
-          status: :unprocessable_entity
+    unless can? :create, @transaction
+      @transaction = Request.new @transaction.info
+      authorize!(:create, @transaction)
+    end
+
+    if @transaction.save
+      respond_to do |format|
+        format.html { redirect_to root_path }
+        format.json { render json: @transaction, status: :created }
       end
     else
-      request = Request.new @transaction.info
-      authorize!(:create, request)
-      if request.save
-        render json: request, status: :created
-      else
-        render json: request.errors.full_messages,
-          status: :unprocessable_entity
+      respond_to do |format|
+        format.html { redirect_to root_path }
+        format.json { render json: @transaction.errors.full_messages,
+        status: :unprocessable_entity }
       end
     end
   end
diff --git a/app/models/concerns/base_transaction.rb b/app/models/concerns/base_transaction.rb
index ece8add..80fb884 100644
--- a/app/models/concerns/base_transaction.rb
+++ b/app/models/concerns/base_transaction.rb
@@ -8,7 +8,9 @@ module BaseTransaction
     belongs_to :creditor, class_name: 'User'
     belongs_to :issuer,   polymorphic: true
 
-    validates :amount, numericality: { greater_than: 0 }
+    validates :debtor,   presence: true
+    validates :creditor, presence: true
+    validates :amount,   numericality: { greater_than: 0 }
     validate :different_debtor_creditor
   end