diff --git a/src/order_backup.h b/src/order_backup.h
--- a/src/order_backup.h
+++ b/src/order_backup.h
@@ -28,12 +28,18 @@ typedef Pool<OrderBackup, OrderBackupID,
 /** The pool with order backups. */
 extern OrderBackupPool _order_backup_pool;
 
+/** Flag to pass to the vehicle construction command when an order should be preserved. */
+static const uint32 MAKE_ORDER_BACKUP_FLAG = 1 << 31;
+
 /**
  * Data for backing up an order of a vehicle so it can be
  * restored after a vehicle is rebuilt in the same depot.
  */
 struct OrderBackup : OrderBackupPool::PoolItem<&_order_backup_pool> {
 private:
+	friend const struct SaveLoad *GetOrderBackupDescription(); ///< Saving and loading of order backups.
+	friend void Load_BKOR();   ///< Creating empty orders upon savegame loading.
+	uint32 user;               ///< The user that requested the backup.
 	TileIndex tile;            ///< Tile of the depot where the order was changed.
 	GroupID group;             ///< The group the vehicle was part of.
 	uint16 service_interval;   ///< The service interval of the vehicle.
@@ -43,17 +49,21 @@ private:
 	VehicleOrderID orderindex; ///< The order-index the vehicle had.
 	Order *orders;             ///< The actual orders if the vehicle was not a clone.
 
+	/** Creation for savegame restoration. */
+	OrderBackup() {}
+
 	/**
 	 * Create an order backup for the given vehicle.
-	 * @param v The vehicle to make a backup of.
+	 * @param v    The vehicle to make a backup of.
+	 * @param user The user that is requesting the backup.
 	 */
-	OrderBackup(const Vehicle *v);
+	OrderBackup(const Vehicle *v, uint32 user);
 
 	/**
 	 * Restore the data of this order to the given vehicle.
 	 * @param v The vehicle to restore to.
 	 */
-	void DoRestore(const Vehicle *v);
+	void DoRestore(Vehicle *v);
 
 public:
 	/** Free everything that is allocated. */
@@ -61,23 +71,43 @@ public:
 
 	/**
 	 * Create an order backup for the given vehicle.
-	 * @param v The vehicle to make a backup of.
+	 * @param v    The vehicle to make a backup of.
+	 * @param user The user that is requesting the backup.
 	 * @note Will automatically remove any previous backups of this user.
 	 */
-	static void Backup(const Vehicle *v);
+	static void Backup(const Vehicle *v, uint32 user);
 
 	/**
 	 * Restore the data of this order to the given vehicle.
-	 * @param v The vehicle to restore to.
+	 * @param v    The vehicle to restore to.
+	 * @param user The user that built the vehicle, thus wants to restore.
 	 * @note After restoration the backup will automatically be removed.
 	 */
-	static void Restore(const Vehicle *v);
+	static void Restore(Vehicle *v, uint32 user);
+
+	/**
+	 * Reset an OrderBackup given a tile and user.
+	 * @param tile The tile associated with the OrderBackup.
+	 * @param user The user associated with the OrderBackup.
+	 * @note Must not be used from the GUI!
+	 */
+	static void ResetOfUser(TileIndex tile, uint32 user);
 
 	/**
-	 * Reset the OrderBackups.
-	 * @param tile The tile of the order backup.
+	 * Reset an user's OrderBackup if needed.
+	 * @param user The user associated with the OrderBackup.
+	 * @pre _network_server.
+	 * @note Must not be used from a command.
 	 */
-	static void Reset(TileIndex tile = INVALID_TILE);
+	static void ResetUser(uint32 user);
+
+	/**
+	 * Reset the OrderBackups from GUI/game logic.
+	 * @param tile     The tile of the order backup.
+	 * @param from_gui Whether the call came from the GUI, i.e. whether
+	 *                 it must be synced over the network.
+	 */
+	static void Reset(TileIndex tile = INVALID_TILE, bool from_gui = true);
 
 	/**
 	 * Clear the group of all backups having this group ID.