diff --git a/app/models/invitation.rb b/app/models/invitation.rb
new file mode 100644
index 000000000..c1855624c
--- /dev/null
+++ b/app/models/invitation.rb
@@ -0,0 +1,14 @@
+#   Copyright (c) 2010, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3 or later.  See
+#   the COPYRIGHT file.
+
+class Invitation
+  include MongoMapper::Document
+
+  belongs_to :from, :class => User
+  belongs_to :to, :class => User
+  belongs_to :into, :class => Aspect
+
+  validates_presence_of :from, :to, :into
+
+end
diff --git a/spec/models/invitations_spec.rb b/spec/models/invitations_spec.rb
new file mode 100644
index 000000000..8570e3dec
--- /dev/null
+++ b/spec/models/invitations_spec.rb
@@ -0,0 +1,36 @@
+#   Copyright (c) 2010, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3 or later.  See
+#   the COPYRIGHT file.
+
+require 'spec_helper'
+
+describe Invitation do
+  let(:user)   {make_user}
+  let(:aspect) {user.aspects.create(:name => "Invitees")}
+  let(:user2)  {make_user}
+  describe 'validations' do
+    before do
+      aspect
+      @invitation = Invitation.new(:from => user, :to => user2, :into => aspect) 
+    end
+    it 'is valid' do
+      @invitation.should be_valid
+      @invitation.from.should == user
+      @invitation.to.should   == user2
+      @invitation.into.should == aspect
+    end
+    it 'is from a user' do
+      @invitation.from = nil
+      @invitation.should_not be_valid
+    end
+    it 'is to a user' do
+      @invitation.to = nil
+      @invitation.should_not be_valid
+    end
+    it 'is into an aspect' do
+      @invitation.into = nil
+      @invitation.should_not be_valid
+    end
+  end
+end
+