diff --git a/init.lua b/init.lua
index 85482a8..99da9f0 100644
--- a/init.lua
+++ b/init.lua
@@ -36,22 +36,24 @@ jail.set_permissions_for_the_jail = function (player)
 end
 
 jail.add_jail = function(self_player_name, player_name)
-	for i = 1, #prisoners_list do
-		if prisoners_list[i] == player_name then
-			minetest.chat_send_player(self_player_name, S("The player is already in jail"))
-			return
+	if (minetest.player_exists(player_name)) then
+		for i = 1, #prisoners_list do
+			if prisoners_list[i] == player_name then
+				minetest.chat_send_player(self_player_name, S("The player is already in jail"))
+				return
+			end
 		end
-	end
-	local player = minetest.env:get_player_by_name(player_name)
-	if (player) then
 		table.insert(prisoners_list, player_name)
-		player:setpos(jail.jailpos)
-		minetest.chat_send_player(player_name, minetest.colorize("red", S("You have been sent to jail")))
-		minetest.chat_send_all(minetest.colorize("red",
-				"" .. player_name .. " " .. S("has been sent to jail by") .. " " .. self_player_name))
 		jail.set_permissions_for_the_jail(player_name)
+		local player = minetest.env:get_player_by_name(player_name)
+		minetest.chat_send_all(minetest.colorize("red", 
+					"" .. player_name .. " " .. S("has been sent to jail by") .. " " .. self_player_name))
+		if (player) then			
+			player:setpos(jail.jailpos)
+			minetest.chat_send_player(player_name, minetest.colorize("red", S("You have been sent to jail")))
+		end
 	else
-		minetest.chat_send_player(player_name, minetest.colorize("red", S("Не в сети")))
+		minetest.chat_send_player(self_player_name, minetest.colorize("red", S("The player '") .. player_name .. S("' does not exist, check that the nickname is correct")))
 	end
 end
 
diff --git a/locale/jail.ru.tr b/locale/jail.ru.tr
index 95bcf48..ca43563 100644
--- a/locale/jail.ru.tr
+++ b/locale/jail.ru.tr
@@ -28,4 +28,6 @@ Players online=Игроки онлайн
 Prisoners=Заключенные
 To jail=В тюрьму
 To freedom=На свободу
-Graphical prisoner management shell=Графическая оболочка управления заключенными
\ No newline at end of file
+Graphical prisoner management shell=Интерфейс управления заключенными
+The player '=Игрока '
+' does not exist, check that the nickname is correct=' не сущеcтвует, проверьте правильность ника
\ No newline at end of file