diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index af85615..62a8b84 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -303,4 +303,9 @@ form textarea {
 
 .cd{
   margin-top: 10px;
+}
+
+.error{
+  font-size: 18px;
+  color: red;
 }
\ No newline at end of file
diff --git a/app/models/group.rb b/app/models/group.rb
index 4c7d730..b4bb4cc 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -1,4 +1,7 @@
 class Group < ApplicationRecord
     belongs_to :user
     has_many :transactions
+
+    validates :name, presence: true, length: { maximum: 20 }
+    validates :icon, presence: true
 end
\ No newline at end of file
diff --git a/app/models/transaction.rb b/app/models/transaction.rb
index c835495..06c58b1 100644
--- a/app/models/transaction.rb
+++ b/app/models/transaction.rb
@@ -2,4 +2,11 @@ class Transaction < ApplicationRecord
     belongs_to :user
     belongs_to :group, optional: true
 
+    validates :name, presence: true, length: { maximum: 20 }
+    validates :amount, presence: true, numericality: { less_than_or_equal_to: 100_000, greater_than: 1 }
+    
+    
+    
+    
+
 end
\ No newline at end of file
diff --git a/app/views/groups/_form.html.erb b/app/views/groups/_form.html.erb
index b1119c5..8240a20 100644
--- a/app/views/groups/_form.html.erb
+++ b/app/views/groups/_form.html.erb
@@ -1,4 +1,12 @@
 <%= form_for @group do |f| %>
+
+   <% if @group.errors.any? %>
+   <ul>
+   <% @group.errors.full_messages.each do |msg| %>
+       <li class="error"><%= msg %></li>
+   <% end %>
+    </ul>
+   <% end %>
     <%= f.label :name %><br />
     <%= f.text_field :name %><br />
 
diff --git a/app/views/transactions/_form.html.erb b/app/views/transactions/_form.html.erb
index be45367..8f52a4f 100644
--- a/app/views/transactions/_form.html.erb
+++ b/app/views/transactions/_form.html.erb
@@ -1,4 +1,14 @@
 <%= form_for @transaction do |f| %>
+
+   <% if @transaction.errors.any? %>
+   <ul>
+   <% @transaction.errors.full_messages.each do |msg| %>
+       <li class="error"><%= msg %></li>
+   <% end %>
+    </ul>
+   <% end %>
+
+ 
     <%= f.label :name %><br />
     <%= f.text_field :name %><br />