diff --git a/lib/pact_broker/hash_refinements.rb b/lib/pact_broker/hash_refinements.rb
index 06afa1ac3..9c5ef4d70 100644
--- a/lib/pact_broker/hash_refinements.rb
+++ b/lib/pact_broker/hash_refinements.rb
@@ -45,10 +45,10 @@ def snakecase_keys_private(params)
         when Hash
           params.inject({}) do |result, (key, value)|
             snake_key = case key
-            when String then key.snakecase
-            when Symbol then key.to_s.snakecase.to_sym
-            else
-              key
+                        when String then key.snakecase
+                        when Symbol then key.to_s.snakecase.to_sym
+                        else
+                          key
                         end
             result.merge(snake_key => snakecase_keys_private(value))
           end
@@ -64,10 +64,10 @@ def camelcase_keys_private(params)
         when Hash
           params.inject({}) do |result, (key, value)|
             snake_key = case key
-            when String then key.camelcase
-            when Symbol then key.to_s.camelcase.to_sym
-            else
-              key
+                        when String then key.camelcase
+                        when Symbol then key.to_s.camelcase.to_sym
+                        else
+                          key
                         end
             result.merge(snake_key => camelcase_keys_private(value))
           end
diff --git a/lib/pact_broker/index/service.rb b/lib/pact_broker/index/service.rb
index 2b829574e..e2b29b4eb 100644
--- a/lib/pact_broker/index/service.rb
+++ b/lib/pact_broker/index/service.rb
@@ -156,11 +156,11 @@ def self.head_pact_publications(options = {})
 
         latest = base.overall_latest
         ids_query = if options[:tags].is_a?(Array)
-          latest.union(base.latest_for_consumer_tag(options[:tags]))
-        elsif options[:tags]
-          latest.union(base.latest_by_consumer_tag)
-        else
-          latest
+                      latest.union(base.latest_for_consumer_tag(options[:tags]))
+                    elsif options[:tags]
+                      latest.union(base.latest_by_consumer_tag)
+                    else
+                      latest
                     end
 
         query = PactBroker::Pacts::PactPublication.select_all_qualified.where(Sequel[:pact_publications][:id] => ids_query)
@@ -194,6 +194,14 @@ def self.latest_verifications_for_consumer_version_tags(options)
           nil # should not be used
         end
       end
+
+      def self.validate_pacticipant(pacticipant_type, pacticipant_name)
+        error_messages = []
+
+        pacticipant = pacticipant_service.find_pacticipant_by_name(pacticipant_name)
+
+        error_messages << "#{pacticipant_type} #{pacticipant_name} cannot be found" unless pacticipant
+      end
     end
   end
 end
diff --git a/lib/pact_broker/locale/en.yml b/lib/pact_broker/locale/en.yml
index e17caf922..667665ae7 100644
--- a/lib/pact_broker/locale/en.yml
+++ b/lib/pact_broker/locale/en.yml
@@ -17,6 +17,8 @@ en:
   pact_broker:
     messages:
       response_body_hidden: For security purposes, the response details are not logged. To enable response logging, configure the webhook_host_whitelist property. See %{base_url}/doc/webhooks#whitelist for more information.
+      index:
+        title: Pacts
       matrix:
         pre_verified: This pact was "pre-verified" as it has identical content to a previously verified pact.
       webhooks:
diff --git a/lib/pact_broker/ui/controllers/index.rb b/lib/pact_broker/ui/controllers/index.rb
index 945c674dc..1fda14ee1 100644
--- a/lib/pact_broker/ui/controllers/index.rb
+++ b/lib/pact_broker/ui/controllers/index.rb
@@ -1,5 +1,6 @@
 require 'pact_broker/ui/controllers/base_controller'
 require 'pact_broker/ui/view_models/index_items'
+require 'pact_broker/messages'
 require 'haml'
 
 module PactBroker
@@ -10,10 +11,9 @@ class Index < Base
 
         get "/" do
           set_headers
-          tags = nil
-          if params[:tags]
-            tags = params[:tags] == 'true' ? true : [*params[:tags]].compact
-          end
+          tags = if params[:tags]
+                   params[:tags] == 'true' ? true : [*params[:tags]].compact
+                 end
           page_number = params[:page]&.to_i || 1
           # Make page size smaller for data intensive query
           page_size = params[:pageSize]&.to_i || (tags == true ? 30 : 100)
@@ -23,27 +23,46 @@ class Index < Base
             page_size: page_size
           }
 
+          error_messages = pacticipants.reduce([]) do |agg, (pacticipant_type, pacticipant_name)|
+            agg << index_service.validate_pacticipant(pacticipant_type, pacticipant_name)
+          end.flatten
+
+          options.merge!(pacticipants) if error_messages.blank?
+
           index_items = ViewDomain::IndexItems.new(index_service.find_index_items(options), base_url: base_url)
 
           page = tags ? :'index/show-with-tags' : :'index/show'
           locals = {
-            title: "Pacts",
+            title: PactBroker::Messages.message('messages.index.title'),
             index_items: index_items,
             page_number: page_number,
             page_size: page_size,
             pagination_record_count: index_items.pagination_record_count,
             current_page_size: index_items.size,
-            base_url: base_url
+            base_url: base_url,
+            errors: error_messages
           }
 
           haml page, { locals: locals, layout: :'layouts/main', escape_html: true }
         end
 
+        private
+
         def set_headers
           response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
           response.headers["Pragma"] = "no-cache"
           response.headers["Expires"] = "0"
         end
+
+        def pacticipants
+          consumer_name = params[:consumer_name].blank? ? nil : params[:consumer_name]
+          provider_name = params[:provider_name].blank? ? nil : params[:provider_name]
+
+          @pacticipants ||= {
+            consumer_name: consumer_name,
+            provider_name: provider_name,
+          }.compact
+        end
       end
     end
   end
diff --git a/lib/pact_broker/ui/views/index/show.haml b/lib/pact_broker/ui/views/index/show.haml
index 85aefe339..fca40ec36 100644
--- a/lib/pact_broker/ui/views/index/show.haml
+++ b/lib/pact_broker/ui/views/index/show.haml
@@ -6,6 +6,24 @@
       != render :haml, :'index/_getting-started', :layout => false
     %h1.page-header
       Pacts
+
+    - unless errors.blank?
+      - errors.each do | error |
+        %div.alert.alert-danger
+          = error
+
+    %form{action: "#{base_url}", onsubmit:'return onSubmit()'}
+      .field
+        %label{for: "consumer_name"}
+          Consumer name
+        %input{name: 'consumer_name', id: "consumer_name", class: 'pacticipant_name'}
+      .field
+        %label{for: "provider_name"}
+          Provider name
+        %input{name: 'provider_name', id: "provider_name", class: 'pacticipant_name'}
+      %div.top-of-group
+        %input{type: 'submit'}
+
     %table.table.table-bordered.table-striped{ id: 'relationships' }
       %thead
         %tr
diff --git a/public/stylesheets/index.css b/public/stylesheets/index.css
index 6adf1dd57..bcc0e670b 100644
--- a/public/stylesheets/index.css
+++ b/public/stylesheets/index.css
@@ -232,3 +232,17 @@ span.copy-success-icon {
   width: 16px;
   height: 16px;
 }
+
+.field label {
+  width: 10em;
+  margin-top: 15px;
+}
+
+.field .pacticipant_name {
+  width: 20em;
+}
+
+div.top-of-group {
+  margin-top: 20px;
+  margin-bottom: 20px;
+}
diff --git a/spec/lib/pact_broker/index/service_spec.rb b/spec/lib/pact_broker/index/service_spec.rb
index c9b53f0f3..f0fc01b23 100644
--- a/spec/lib/pact_broker/index/service_spec.rb
+++ b/spec/lib/pact_broker/index/service_spec.rb
@@ -388,6 +388,27 @@ module Index
           end
         end
       end
+
+      describe ".validate_pacticipant" do
+        before { td.create_pact_with_hierarchy }
+
+        context "when validating non existing pacticipant" do
+          it "returns an error" do
+            non_existing_pacticipant_name = "no name"
+            non_existing_pacticipant_type = :pacticipant_type
+            error_messages = subject.validate_pacticipant(non_existing_pacticipant_type, non_existing_pacticipant_name)
+            expect(error_messages.count).to eq(1)
+            expect(error_messages.first).to eq("pacticipant_type no name cannot be found")
+          end
+        end
+
+        context "when validating existing pacticipant" do
+          it "returns no error" do
+            error_messages = subject.validate_pacticipant(:consumer_name, "Consumer")
+            expect(error_messages).to be_nil
+          end
+        end
+      end
     end
   end
 end
diff --git a/spec/lib/pact_broker/ui/controllers/index_spec.rb b/spec/lib/pact_broker/ui/controllers/index_spec.rb
index 52f3232b6..dbe1f58a4 100644
--- a/spec/lib/pact_broker/ui/controllers/index_spec.rb
+++ b/spec/lib/pact_broker/ui/controllers/index_spec.rb
@@ -85,6 +85,56 @@ module Controllers
                 get "/", { tags: "prod" }
               end
             end
+
+            context "when parameter consumer_name presents" do
+              context "when it is blank" do
+                it "ignores it" do
+                  expect(PactBroker::Index::Service).not_to receive(:find_index_items).with(hash_including(:consumer_name))
+                  get "/", { consumer_name: "" }
+                end
+              end
+
+              context "when it is NOT blank and the pacticipant name exist" do
+                it "passes consumer_name to the service" do
+                  allow(PactBroker::Index::Service).to receive(:validate_pacticipant).and_return([])
+                  expect(PactBroker::Index::Service).to receive(:find_index_items).with(hash_including(consumer_name: "Consumer"))
+                  get "/", { consumer_name: "Consumer" }
+                end
+              end
+
+              context "when it is NOT blank but the pacticipant name does NOT exist" do
+                it "passes consumer_name to the service" do
+                  allow(PactBroker::Index::Service).to receive(:validate_pacticipant).and_return(["pacticipant does not exist"])
+                  expect(PactBroker::Index::Service).not_to receive(:find_index_items).with(hash_including(:consumer_name))
+                  get "/", { consumer_name: "Consumer" }
+                end
+              end
+            end
+
+            context "when parameter provider_name presents" do
+              context "when it is blank" do
+                it "ignores it" do
+                  expect(PactBroker::Index::Service).not_to receive(:find_index_items).with(hash_including(:provider_name))
+                  get "/", { provider_name: "" }
+                end
+              end
+
+              context "when it is NOT blank and the pacticipant exists" do
+                it "passes provider_name to the service" do
+                  allow(PactBroker::Index::Service).to receive(:validate_pacticipant).and_return([])
+                  expect(PactBroker::Index::Service).to receive(:find_index_items).with(hash_including(provider_name: "Provider"))
+                  get "/", { provider_name: "Provider" }
+                end
+              end
+
+              context "when it is NOT blank but the pacticipant name does NOT exist" do
+                it "passes provider_name to the service" do
+                  allow(PactBroker::Index::Service).to receive(:validate_pacticipant).and_return(["pacticipant does not exist"])
+                  expect(PactBroker::Index::Service).not_to receive(:find_index_items).with(hash_including(:provider_name))
+                  get "/", { provider_name: "Provider" }
+                end
+              end
+            end
           end
         end
       end