diff --git a/src/Command/Member/AbstractMemberCommand.php b/src/Command/Member/AbstractMemberCommand.php
new file mode 100644
index 0000000..53cda5c
--- /dev/null
+++ b/src/Command/Member/AbstractMemberCommand.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace SilverLeague\Console\Command\Member;
+
+use SilverLeague\Console\Command\SilverStripeCommand;
+use SilverStripe\Security\Member;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Provides a base for member related commands, lookups etc
+ *
+ * @package silverstripe-console
+ * @author  Robbie Averill <robbie@averill.co.nz>
+ */
+abstract class AbstractMemberCommand extends SilverStripeCommand
+{
+    /**
+     * Get a member by the provided email address, output an error message if not found
+     *
+     * @param InputInterface $input
+     * @param OutputInterface $output
+     * @return Member|false
+     */
+    protected function getMember(InputInterface $input, OutputInterface $output)
+    {
+        $email = $this->getOrAskForArgument($input, $output, 'email', 'Enter email address: ');
+        if (empty($email)) {
+            $output->writeln('<error>Please enter an email address.</error>');
+            return false;
+        }
+
+        /** @var Member $member */
+        $member = Member::get()->filter('email', $email)->first();
+        if (!$member) {
+            $output->writeln('<error>Member with email "' . $email . '" was not found.');
+            return false;
+        }
+
+        return $member;
+    }
+}
+
diff --git a/src/Command/Member/ChangeGroupsCommand.php b/src/Command/Member/ChangeGroupsCommand.php
index ce27435..0f5812d 100644
--- a/src/Command/Member/ChangeGroupsCommand.php
+++ b/src/Command/Member/ChangeGroupsCommand.php
@@ -2,9 +2,7 @@
 
 namespace SilverLeague\Console\Command\Member;
 
-use SilverLeague\Console\Command\SilverStripeCommand;
 use SilverStripe\Security\Group;
-use SilverStripe\Security\Member;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -16,7 +14,7 @@
  * @package silverstripe-console
  * @author  Robbie Averill <robbie@averill.co.nz>
  */
-class ChangeGroupsCommand extends SilverStripeCommand
+class ChangeGroupsCommand extends AbstractMemberCommand
 {
     /**
      * {@inheritDoc}
@@ -34,16 +32,14 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        $email = $this->getOrAskForArgument($input, $output, 'email', 'Enter email address: ');
-        $member = Member::get()->filter('email', $email)->first();
+        $member = $this->getMember($input, $output);
         if (!$member) {
-            $output->writeln('<error>Member with email "' . $email . '" was not found.');
             return;
         }
 
         if ($member->Groups()->count()) {
             $output->writeln(
-                'Member <info>' . $email . '</info> is already in the following groups (will be overwritten):'
+                'Member <info>' . $member->Email . '</info> is already in the following groups (will be overwritten):'
             );
             $output->writeln('   ' . implode(', ', $member->Groups()->column('Code')));
             $output->writeln('');
@@ -55,7 +51,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $newGroups = $this->getHelper('question')->ask($input, $output, $question);
 
-        $output->writeln('Adding <info>' . $email . '</info> to groups: ' . implode(', ', $newGroups));
+        $output->writeln('Adding <info>' . $member->Email . '</info> to groups: ' . implode(', ', $newGroups));
         // $member->Groups()->removeAll();
         foreach ($newGroups as $group) {
             $member->addToGroupByCode($group);
diff --git a/src/Command/Member/ChangePasswordCommand.php b/src/Command/Member/ChangePasswordCommand.php
index dbca444..7acfd00 100644
--- a/src/Command/Member/ChangePasswordCommand.php
+++ b/src/Command/Member/ChangePasswordCommand.php
@@ -2,9 +2,7 @@
 
 namespace SilverLeague\Console\Command\Member;
 
-use SilverLeague\Console\Command\SilverStripeCommand;
 use SilverStripe\ORM\ValidationResult;
-use SilverStripe\Security\Member;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -15,7 +13,7 @@
  * @package silverstripe-console
  * @author  Robbie Averill <robbie@averill.co.nz>
  */
-class ChangePasswordCommand extends SilverStripeCommand
+class ChangePasswordCommand extends AbstractMemberCommand
 {
     /**
      * {@inheritDoc}
@@ -41,10 +39,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
             return;
         }
 
-        /** @var Member $member */
-        $member = Member::get()->filter('email', $email)->first();
+        $member = $this->getMember($input, $output);
         if (!$member) {
-            $output->writeln('<error>Member with email "' . $email . '" was not found.');
             return;
         }
 
diff --git a/src/Command/Member/CreateCommand.php b/src/Command/Member/CreateCommand.php
index e23fd30..ff61b2d 100644
--- a/src/Command/Member/CreateCommand.php
+++ b/src/Command/Member/CreateCommand.php
@@ -49,6 +49,13 @@ protected function execute(InputInterface $input, OutputInterface $output)
             return;
         }
 
+        // Check for existing member
+        $member = Member::get()->filter(['Email' => $data['Email']])->first();
+        if ($member) {
+            $output->writeln('<error>Member already exists with email address: ' . $data['Email']);
+            return;
+        }
+
         $member = Member::create();
         foreach ($data as $key => $value) {
             $member->setField($key, $value);
diff --git a/src/Command/Member/LockCommand.php b/src/Command/Member/LockCommand.php
index eb65e9d..dffd64c 100644
--- a/src/Command/Member/LockCommand.php
+++ b/src/Command/Member/LockCommand.php
@@ -2,7 +2,6 @@
 
 namespace SilverLeague\Console\Command\Member;
 
-use SilverLeague\Console\Command\SilverStripeCommand;
 use SilverStripe\ORM\FieldType\DBDatetime;
 use SilverStripe\Security\Member;
 use Symfony\Component\Console\Input\InputArgument;
@@ -15,7 +14,7 @@
  * @package silverstripe-console
  * @author  Robbie Averill <robbie@averill.co.nz>
  */
-class LockCommand extends SilverStripeCommand
+class LockCommand extends AbstractMemberCommand
 {
     protected function configure()
     {
@@ -27,16 +26,8 @@ protected function configure()
 
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        $email = $this->getOrAskForArgument($input, $output, 'email', 'Enter email address: ');
-        if (empty($email)) {
-            $output->writeln('<error>Please enter an email address.</error>');
-            return;
-        }
-
-        /** @var Member $member */
-        $member = Member::get()->filter('email', $email)->first();
+        $member = $this->getMember($input, $output);
         if (!$member) {
-            $output->writeln('<error>Member with email "' . $email . '" was not found.');
             return;
         }
 
@@ -45,7 +36,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $member->FailedLoginCount = 0;
         $member->write();
 
-        $output->writeln('Member <info>' . $email . '</info> locked for <info>' . $lockoutMins . ' mins.</info>');
+        $output->writeln('Member <info>' . $member->Email . '</info> locked for <info>' . $lockoutMins . ' mins.</info>');
     }
 }
 
diff --git a/src/Command/Member/UnlockCommand.php b/src/Command/Member/UnlockCommand.php
index 47fbe47..ca55102 100644
--- a/src/Command/Member/UnlockCommand.php
+++ b/src/Command/Member/UnlockCommand.php
@@ -2,9 +2,6 @@
 
 namespace SilverLeague\Console\Command\Member;
 
-use SilverLeague\Console\Command\SilverStripeCommand;
-use SilverStripe\ORM\FieldType\DBDatetime;
-use SilverStripe\Security\Member;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -15,7 +12,7 @@
  * @package silverstripe-console
  * @author  Robbie Averill <robbie@averill.co.nz>
  */
-class UnlockCommand extends SilverStripeCommand
+class UnlockCommand extends AbstractMemberCommand
 {
     protected function configure()
     {
@@ -27,16 +24,8 @@ protected function configure()
 
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        $email = $this->getOrAskForArgument($input, $output, 'email', 'Enter email address: ');
-        if (empty($email)) {
-            $output->writeln('<error>Please enter an email address.</error>');
-            return;
-        }
-
-        /** @var Member $member */
-        $member = Member::get()->filter('email', $email)->first();
+        $member = $this->getMember($input, $output);
         if (!$member) {
-            $output->writeln('<error>Member with email "' . $email . '" was not found.');
             return;
         }
 
@@ -44,7 +33,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $member->FailedLoginCount = 0;
         $member->write();
 
-        $output->writeln('Member <info>' . $email . '</info> unlocked.');
+        $output->writeln('Member <info>' . $member->Email . '</info> unlocked.');
     }
 }
 
diff --git a/tests/Command/Member/CreateCommandTest.php b/tests/Command/Member/CreateCommandTest.php
index 1445900..0eedf6e 100644
--- a/tests/Command/Member/CreateCommandTest.php
+++ b/tests/Command/Member/CreateCommandTest.php
@@ -50,14 +50,19 @@ public function testExecute()
 
         $this->command->getApplication()->getHelperSet()->set($questionHelper, 'question');
 
-        $tester = $this->executeTest(
-            [
-                'email'    => 'unittest@example.com',
-                'password' => 'OpenSe$am3!'
-            ]
-        );
+        $tester = $this->executeTest([
+            'email'    => 'unittest@example.com',
+            'password' => 'OpenSe$am3!',
+        ]);
         $output = $tester->getDisplay();
         $this->assertContains('Member created', $output);
+
+        $tester = $this->executeTest([
+            'email'    => 'unittest@example.com',
+            'password' => 'OpenSe$am3!',
+        ]);
+        $output = $tester->getDisplay();
+        $this->assertContains('Member already exists', $output);
     }
 
     /**