diff --git a/lib/travis/api/v3.rb b/lib/travis/api/v3.rb
index 8e0d3909..221df59b 100644
--- a/lib/travis/api/v3.rb
+++ b/lib/travis/api/v3.rb
@@ -37,4 +37,3 @@ module Travis
     end
   end
 end
-
diff --git a/lib/travis/api/v3/result.rb b/lib/travis/api/v3/result.rb
index 7f8d2b0d..c6875af1 100644
--- a/lib/travis/api/v3/result.rb
+++ b/lib/travis/api/v3/result.rb
@@ -1,8 +1,9 @@
 module Travis::API::V3
   class Result
-    attr_accessor :access_control, :type, :resource, :status, :href, :meta_data
+    attr_accessor :access_control, :type, :resource, :status, :href, :meta_data, :warnings
 
     def initialize(access_control, type, resource = [], status: 200, **meta_data)
+      @warnings = []
       @access_control, @type, @resource, @status, @meta_data = access_control, type, resource, status, meta_data
     end
 
@@ -10,6 +11,15 @@ module Travis::API::V3
       super or method.to_sym == type.to_sym
     end
 
+    def warn(message, **info)
+      warnings << { :@type => 'warning'.freeze, :message => message, **info }
+    end
+
+    def ignored_param(param, reason: nil, **info)
+      message = reason ? "query parameter #{param} #{reason}, ignored" : "query parameter #{param} ignored"
+      warn(message, warning_type: :ignored_parameter, parameter: param, **info)
+    end
+
     def <<(value)
       resource << value
       self
@@ -19,7 +29,7 @@ module Travis::API::V3
       href    = self.href
       href    = V3.location(env) if href.nil? and env['REQUEST_METHOD'.freeze] == 'GET'.freeze
       include = params['include'.freeze].to_s.split(?,.freeze)
-      Renderer[type].render(resource,
+      add_info Renderer[type].render(resource,
         href:           href,
         script_name:    env['SCRIPT_NAME'.freeze],
         include:        include,
@@ -27,6 +37,14 @@ module Travis::API::V3
         meta_data:      meta_data)
     end
 
+    def add_info(payload)
+      if warnings.any?
+        payload = { :@warnings => [] }.merge!(payload) unless payload.include? :@warnings
+        payload[:@warnings].concat(warnings)
+      end
+      payload
+    end
+
     def method_missing(method, *args)
       return super unless method.to_sym == type.to_sym
       raise ArgumentError, 'wrong number of arguments (1 for 0)'.freeze if args.any?
diff --git a/lib/travis/api/v3/router.rb b/lib/travis/api/v3/router.rb
index 1c89ffd4..8e39fc15 100644
--- a/lib/travis/api/v3/router.rb
+++ b/lib/travis/api/v3/router.rb
@@ -16,8 +16,11 @@ module Travis::API::V3
 
       raise NotFound unless factory
 
-      service         = factory.new(access_control, factory.filter_params(env_params).merge(params))
+      filtered        = factory.filter_params(env_params)
+      service         = factory.new(access_control, filtered.merge(params))
       result          = service.run
+
+      env_params.each_key { |key| result.ignored_param(key, reason: "not whitelisted".freeze) unless filtered.include?(key) }
       render(result, env_params, env)
     rescue Error => error
       result  = Result.new(access_control, :error, error)
diff --git a/spec/v3/services/owner/find_spec.rb b/spec/v3/services/owner/find_spec.rb
index 66d3feca..fd8fc6fa 100644
--- a/spec/v3/services/owner/find_spec.rb
+++ b/spec/v3/services/owner/find_spec.rb
@@ -130,14 +130,19 @@ describe Travis::API::V3::Services::Owner::Find do
       before  { get("/v3/owner/example-org?organization.id=#{other.id}") }
       example { expect(last_response).to be_ok   }
       example { expect(JSON.load(body)).to be == {
-        "@type"        => "organization",
-        "@href"        => "/v3/org/#{org.id}",
-        "@permissions" => { "read"=>true, "sync"=>false },
-        "id"           => org.id,
-        "login"        => "example-org",
-        "name"         => nil,
-        "github_id"    => nil,
-        "avatar_url"   => nil
+        "@type"          => "organization",
+        "@href"          => "/v3/org/#{org.id}",
+        "@permissions"   => { "read"=>true, "sync"=>false },
+        "id"             => org.id,
+        "login"          => "example-org",
+        "name"           => nil,
+        "github_id"      => nil,
+        "avatar_url"     => nil,
+        "@warnings"      => [{
+          "@type"        => "warning",
+          "message"      => "query parameter organization.id not whitelisted, ignored",
+          "warning_type" => "ignored_parameter",
+          "parameter"    => "organization.id"}]
       }}
     end
   end
@@ -198,7 +203,12 @@ describe Travis::API::V3::Services::Owner::Find do
         "github_id"    => nil,
         "avatar_url"   => nil,
         "is_syncing"   => nil,
-        "synced_at"    => nil
+        "synced_at"    => nil,
+        "@warnings"      => [{
+          "@type"        => "warning",
+          "message"      => "query parameter user.id not whitelisted, ignored",
+          "warning_type" => "ignored_parameter",
+          "parameter"    => "user.id"}]
       }}
     end
   end