I am currently using my customized Van Der Spek compact size binder as my wallet. Often of time, I find myself trying to rush the receipt in my binder/wallet. Instead of putting into the full length pocket, I just leave the receipt at the very front of the binder, snap it close and leave the stores. It really bothers me as I don't like to see pieces of paper here and there. I tried to search online to see if there is side open pocket insert for my binder but cannot find any. Yesterday I came across to Sea Lemon's Youtube Chanel on How to Add a Pocket to Your Book. I adopted the idea and made into the pocket for my binder :)
After-Receipts need to be recorded are properly stored in this side open pocket.
This is how it looks like after I completed the side open pocket. I made this out of the catalog from Tiffany&Co. This is just a prototype. I will probably make a nicer one after :)