“Do I have any chance of spotting a bribe”? Good question. If you work in a large organisation, you may see so many payments processed. Plus, what reason would you have to suspect bribes anyway.
This might be stating a very obvious point, but in companies that were thought to have had a system of bribers, the payments were not processed under the heading ‘bribe’.
It might be that giving the bribe a legitimate narrative is a deliberate cover-up. Or that those involved had convinced themselves that this “fee” was a necessary part of doing business in this country. But if ‘without it’, the business would go elsewhere, the payments deserve to be investigated.
So, finding out how the cover-up worked in cases we know about, say- through published court cases, might be a “compliance guide” for you: the starting point of a discussion on what to look out for.