diff --git a/README.md b/README.md
index 9e4023038..690625b41 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ export NOTIFICATION_QUEUE_PREFIX='[unique-to-environment]-notification_developme
 export SECRET_KEY='dev-notify-secret-key'
 export SQLALCHEMY_DATABASE_URI = 'postgresql://localhost/notification_api'
 export VERIFY_CODE_FROM_EMAIL_ADDRESS='no-reply@notify.works'
+export NOTIFY_EMAIL_DOMAIN='dev.notify.com'
 "> environment.sh
 ```
 
diff --git a/app/models.py b/app/models.py
index 84726164a..e0065e3e3 100644
--- a/app/models.py
+++ b/app/models.py
@@ -224,3 +224,38 @@ class Notification(db.Model):
         onupdate=datetime.datetime.now)
     status = db.Column(
         db.Enum(*NOTIFICATION_STATUS_TYPES, name='notification_status_types'), nullable=False, default='sent')
+
+
+INVITED_USER_STATUS_TYPES = ['pending', 'accepted', 'cancelled']
+
+
+class InvitedUser(db.Model):
+
+    __tablename__ = 'invited_users'
+
+    id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    email_address = db.Column(db.String(255), nullable=False)
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), index=True, nullable=False)
+    from_user = db.relationship('User')
+    service_id = db.Column(UUID(as_uuid=True), db.ForeignKey('services.id'), index=True, unique=False)
+    service = db.relationship('Service')
+    _token = db.Column(db.String, nullable=False)
+    created_at = db.Column(
+        db.DateTime,
+        index=False,
+        unique=False,
+        nullable=False,
+        default=datetime.datetime.now)
+    status = db.Column(
+        db.Enum(*INVITED_USER_STATUS_TYPES, name='invited_users_status_types'), nullable=False, default='invited')
+
+    @property
+    def token(self):
+        raise AttributeError("Token not readable")
+
+    @token.setter
+    def token(self, token):
+        self._token = hashpw(token)
+
+    def check_token(self, token):
+        return check_hash(token, self._token)
diff --git a/migrations/versions/0022_add_invite_users.py b/migrations/versions/0022_add_invite_users.py
new file mode 100644
index 000000000..b77be1d73
--- /dev/null
+++ b/migrations/versions/0022_add_invite_users.py
@@ -0,0 +1,42 @@
+"""empty message
+
+Revision ID: 0022_add_invite_users
+Revises: 0021_add_job_metadata
+Create Date: 2016-02-23 16:41:40.481468
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0022_add_invite_users'
+down_revision = '0021_add_job_metadata'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('invited_users',
+    sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('email_address', sa.String(length=255), nullable=False),
+    sa.Column('user_id', sa.Integer(), nullable=False),
+    sa.Column('service_id', postgresql.UUID(as_uuid=True), nullable=True),
+    sa.Column('_token', sa.String(), nullable=False),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.Column('status', sa.Enum('pending', 'accepted', 'cancelled', name='invited_users_status_types'), nullable=False),
+    sa.ForeignKeyConstraint(['service_id'], ['services.id'], ),
+    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_invited_users_service_id'), 'invited_users', ['service_id'], unique=False)
+    op.create_index(op.f('ix_invited_users_user_id'), 'invited_users', ['user_id'], unique=False)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_invited_users_user_id'), table_name='invited_users')
+    op.drop_index(op.f('ix_invited_users_service_id'), table_name='invited_users')
+    op.drop_table('invited_users')
+    op.execute('DROP TYPE invited_users_status_types')
+    ### end Alembic commands ###