You need to do the Test with proper receipt and simulate it. Not recommended!
It’s not first time to get notification about invalid receipt, padahal itu dihari yang sama sudah terbaca value dan tenant apa. So I think I need to get the feedback to developer to make a proper apps and smarter. I Know its just poin Collection but I need to let you Know that your apps Totally isnt working well and you need to review it! I was amazed wow this apps is more advance compare to other Mall. But sorry it’s not.