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At least the bank statement for an Amazon purchase contains an ID that can easily be linked to a purchase on the website. I have also seen the behaviour of multiple items in the same purchase being split across different transactions. I think this happens when the items are actually offered by non-Amazon sellers.

I wish PayPal transactions would contain an ID that is somehow useable.



Wait it does? I've never been able to reverse that ID.


The memo starts with something like "123-0000000-1234567 Amazon.de". The corresponding link would be https://www.amazon.de/gp/css/summary/edit.html?orderID=123-0...


Ah. US credit card transactions have an id that looks like a hash, presumably because card charge descriptors have such a short maximum length.


Same in Europe at least for VISA/MC, the parent probably used a non-card payment method.




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