To know beforehand if a receipt is gonna be NOT_EXPLOITABLE for sure (some might become not exploitable further in the analysis), use the quality check feature ! It costs 0,01€ per receipt with the Lite plan, and is free with the Regular and Custom plan.
If you have a lot of NOT_EXPLOITABLE receipts, there may be several reasons. This article list different reasons often responsible for this flag.
First, we have a margin error. Until XXX % of not exploitable receipts, we consider it as normal for now and we are constantly working on improving our technology (but we will never achieve 100% as it is simply impossible).
However there are several things you can check to make sure this can't be improved.
Check the quality
If the receipt is unreadable by a human, then our solution cannot read it too. We cannot imagine what is written in a really blurry picture or behind a crease.
Things written by hand
If there are annotations, circled words etc, our solution will try to read this too, and will obviously fail, so the receipt can come out as not exploitable.
The receipt format is new
If you are sending receipts from a sign we do not officially support, then the format of the receipt can be different than the ones our solution is trained for. If the format is different, then our receipt analyzer won't know where to look for the information, and won't be able to exploit the receipt.
If this is your case and you plan on receiving a lot of these receipts, do not hesitate to contact us at firstname.lastname@example.org.
The fewer changes you made, the better
This pretty much sums up the most important thing about receipts. Do not change the format of the receipt (send jpeg and not png), do not crop the picture, etc... Any change you can think of, please avoid them!
Why? Because raw pictures of receipts allow us to read the geo-stamp and time-stamp which means to know when and where the picture was taken. This can be useful to compare when the users bought the products and where does he probably lives (place where the picture was taken). This helps you know the customer catchment area.
If you still have issues with this, submit a request!