All these have account statements and bills from transactions with me, but they all have different interfaces to get at them – my wish for 2016: pls provide us with a unique interface for retrieving all these documents (but I doubt, we will be any closer to this in 2020):
- postbank.de
 - amazon.de
 - paypal.de
 - oreilly.com – O’Reilly
 - pragprog.com – Pragmatic Programmers
 - telekom.de – Deutsche Telekom / “Festnetz”
 - telekom.de – Deutsche Telekom / “Mobilfunk”
 - vistaprint.de
 - cyberport.de
 - united-domains.de
 - …