diff --git a/inside/User.php b/inside/User.php
index c815e45..ef82243 100644
--- a/inside/User.php
+++ b/inside/User.php
@@ -98,6 +98,17 @@ class User {
                     return false;
                 }
 
+                /* TODO replace +47 and 0047 with blank */
+                //if( $data['phonenumber'] ) {
+                //}
+
+                /* No duplicate phone numbers */
+                if( getUseridFromPhone($data['phonenumber']) !== false ) {
+                    notify("Telefonnummeret er allerede registrert på en bruker.");
+                    $this->id = -1;
+                    return false;
+                }
+
                 if (isset ($data['active'])) {
                     $this->division_id_request = $data['division'];
                 } else {
diff --git a/snapporder/api/query.php b/snapporder/api/query.php
index b29a257..532261b 100644
--- a/snapporder/api/query.php
+++ b/snapporder/api/query.php
@@ -1,12 +1,4 @@
 <?php
-set_include_path("../../includes/");
-require_once("../../inside/credentials.php");
-require_once("../../inside/functions.php");
-require_once("../../includes/DB.php");
-
-require_once("../lib/CryptoHelper.php");
-require_once("../lib/functions.php");
-require_once("../config.php");
 /* 
  * Lookup a members phone number and return a member-like object.
  *
@@ -23,10 +15,21 @@ require_once("../config.php");
  *   "cardno": "12345",
  *   "firstName": "Jon",
  *   "lastName": "Hansen",
- *   "email": "jon@uio.no"
+ *   "email": "jon@uio.no",
+ *   "registration_status": "partial" // "partial" means show link
  * }
  *
  */
+set_include_path("../../includes/");
+
+require_once("../../inside/credentials.php");
+require_once("../../inside/functions.php");
+require_once("../../includes/DB.php");
+
+require_once("../lib/CryptoHelper.php");
+require_once("../lib/functions.php");
+require_once("../config.php");
+
 $crypt = new CryptoHelper(SNAP_IV, SNAP_KEY);
 
 /* Checks */
diff --git a/snapporder/api/register.php b/snapporder/api/register.php
index 93860a2..c2d22df 100644
--- a/snapporder/api/register.php
+++ b/snapporder/api/register.php
@@ -1,18 +1,4 @@
 <?php 
-
-/* Pull in Inside */
-set_include_path("../../inside/");
-require_once("functions.php");
-require_once("User.php");
-set_include_path("../../includes/");
-require_once("DB.php");
-
-/* Our own */
-require_once("../lib/CryptoHelper.php");
-require_once("../lib/functions.php");
-require_once("../config.php");
-
-
 /* 
  * Registers a user in the user table
  *
@@ -35,7 +21,8 @@ require_once("../config.php");
  *   "membershipNumber": "dsadsa2333",
  *   "firstName": "Jon",
  *   "lastName": "Hansen",
- *   "email": "jon@uio.no"
+ *   "email": "jon@uio.no",
+ *   "registration_status": "partial" // "partial" or "full"
  * }
  *
  * TODO:
@@ -43,6 +30,18 @@ require_once("../config.php");
  * - return result
  */
 
+/* Pull in Inside */
+set_include_path("../../inside/");
+require_once("functions.php");
+require_once("User.php");
+set_include_path("../../includes/");
+require_once("DB.php");
+
+/* Our own */
+require_once("../lib/CryptoHelper.php");
+require_once("../lib/functions.php");
+require_once("../config.php");
+
 /* Validate request */
 $body = file_get_contents('php://input');
 if(strlen($body) === 0) {
@@ -72,20 +71,35 @@ foreach($required_keys as $key) {
         die();
     }
 }
-// TODO validate phonenumber
-// TODO validate email
-// TODO look at getUseridFromPhone in inside/functions.php
-// TODO when $fromSnappOrder is sent to User-constructor...
-// ...then work around requirements for username, password, birthdate, address 
+var_dump($data);
+
+if( !valid_phonenumber($data['phone']) ) {
+    set_response_code(400);
+    echo json_encode(array('error' => 'Not a phone number:'.$data['phone']));
+    die();
+}
+if( !valid_email($data['email']) ) {
+    set_response_code(400);
+    echo json_encode(array('error' => 'Not an email: '.$data['email']));
+    die();
+}
+/* Existing user? */
+if( getUseridFromEmail($data['email']) !== false) {
+    set_response_code(409);
+    echo json_encode(array('error' => 'Existing user with email: '.$data['email']));
+    die();
+}
+if( getUseridFromPhone($data['phone']) !== false ) {
+    set_response_code(409);
+    echo json_encode(array('error' => 'Existing user with phone: '.$data['phone']));
+    die();
+}
 
 /* Create user */
-//$new_user = new User(NULL, $data);
+$user_id = add_user($data);
 
 /* Get and format user */
-//$user = get_user($new_user->id);
-
-/* Add back phone number from query */
-//$user['phone'] = $phone;
+$user = get_user($user_id);
 
 /* Return encrypted user object */
 //echo json_encode($user);
diff --git a/snapporder/lib/functions.php b/snapporder/lib/functions.php
index 4a53434..4c7604e 100644
--- a/snapporder/lib/functions.php
+++ b/snapporder/lib/functions.php
@@ -1,4 +1,6 @@
 <?php
+require_once("../../inside/functions.php");
+
 /* Set HTTP response code */
 function set_response_code($code) {
     if(!is_int($code)) {
@@ -7,6 +9,23 @@ function set_response_code($code) {
     header('X-Ignore-This: something', true, $code);
 }
 
+function add_user($data) {
+    global $conn;
+
+    /* TODO validate input */
+    echo json_encode( array('error' => 'not implemented' ) );
+    die();
+
+    // TODO $cols from data
+    $sql = 'INSERT INTO din_user ('.implode($cols, ",").') VALUES ()';
+
+    $res = $conn->query($sql);
+    if( DB::isError($res) ) {
+        echo json_encode( array('error' => 'db_error', 'error_message' => $res->toString() ) );
+        die();
+    }
+}
+
 /* Get user object with group ids and membership status */
 function get_user($user_id) {
     global $conn;
@@ -46,5 +65,7 @@ function get_user($user_id) {
 function valid_phonenumber($phone) {
     return is_numeric($phone) && strlen($phone) === 8;
 }
-
+function valid_email($email) {
+    return preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/i", $email);
+}
 ?>
diff --git a/snapporder/tests/testuser.json b/snapporder/tests/testuser.json
index 0b2080e..7439f0a 100644
--- a/snapporder/tests/testuser.json
+++ b/snapporder/tests/testuser.json
@@ -1,6 +1,6 @@
 {
     "firstname": "Test",
     "lastname": "Testesen",
-    "email": "asdf@asdf.com",
-    "phone": "48105886"
+    "email": "asdfasdfz@asdf.com",
+    "phone": "48105887"
 }