Get yourself over to http://www.customreceipt.com/ Fill out the form and get your receipt. You will want to find a small company, as the receipts made by the generator are pretty basic, so I go for independent shops in small towns as they are more likely to have the cheap, older tills which produced receipts like these. Once you have found a suitable company use there name and address on the receipt.
With a bit of basic MS paint work you can get it looking something like this:
The Crinkle FX
In this stage we add some crinkle to your receipt to make it look like its been in your pocket or wallet.
Google 'Crinkled Paper' and a picture like this will do the job:
Crop it down to size and paste it into a new layer above the original receipt
You should have something looking like this:
Drag the new 'crinkled paper' image over the whole receipt and then lower the opacity so you can see both images.
You should now have something looking like this:
I do this stage to make it look like you have scanned the image in, Its entirely up to you whether you choose to do it or now.
Create a new layer and click the gradient option, drag from one corner to the other, or from one side to an other. Remember to alter the opacity so you can see the receipt and the crinkle behind it.
It should look something like this: