diff --git a/php/EE/Loggers/Regular.php b/php/EE/Loggers/Regular.php
index 168e8fbc8..5c06a91ca 100644
--- a/php/EE/Loggers/Regular.php
+++ b/php/EE/Loggers/Regular.php
@@ -42,7 +42,7 @@ public function warning( $message ) {
 	}
 
 	/**
-	 * Write an message to STDERR, prefixed with "Error: ".
+	 * Write a message to STDERR, prefixed with "Error: ".
 	 *
 	 * @param string $message Message to write.
 	 */
@@ -50,6 +50,15 @@ public function error( $message ) {
 		$this->_line( $message, 'Error', '%R', STDERR );
 	}
 
+	/**
+	 * Write a message, prefixed with "Notice: ".
+	 *
+	 * @param string $message Message to write.
+	 */
+	public function notice( $message ) {
+		$this->_line( $message, 'Notice', '%y' );
+	}
+
 	/**
 	 * Similar to error( $message ), but outputs $message in a red box
 	 *
diff --git a/php/EE/Runner.php b/php/EE/Runner.php
index 8e608b315..f0c647b95 100644
--- a/php/EE/Runner.php
+++ b/php/EE/Runner.php
@@ -777,6 +777,17 @@ public function start() {
 			$this->arguments[] = 'help';
 		}
 
+		// Print a deprecation warning if 'create' or 'delete' is being used (ee auth).
+		if ( 'auth' === $this->arguments[0] && ( 'create' === $this->arguments[1] || 'delete' === $this->arguments[1] ) ) {
+			$deprecation_warn = sprintf(
+				'`%1$s` is deprecated and will be replaced with `%2$s`. See: `ee auth %2$s`',
+				$this->arguments[1],
+				( 'create' === $this->arguments[1] ? 'add' : 'remove' )
+			);
+
+			EE::notice( $deprecation_warn );
+		}
+
 		// Protect 'cli info' from most of the runtime,
 		// except when the command will be run over SSH
 		if ( ! empty( $this->arguments[0] ) && 'cli' === $this->arguments[0] && ! empty( $this->arguments[1] ) && 'info' === $this->arguments[1] ) {
diff --git a/php/class-ee.php b/php/class-ee.php
index e9dc1b0d3..a4b9cfc4d 100644
--- a/php/class-ee.php
+++ b/php/class-ee.php
@@ -572,6 +572,17 @@ public static function warning( $message ) {
 		self::$file_logger->warning( $message );
 	}
 
+	/**
+	 * Display notice message prefixed with "Notice: ".
+	 *
+	 * @param string $message Message to write.
+	 *
+	 * @return null
+	 */
+	public static function notice( $message ) {
+		self::$logger->notice( self::error_to_string( $message ) );
+	}
+
 	/**
 	 * Display error message prefixed with "Error: " and exit script.
 	 *