This blog post is the continuation of our parcel research. We already reported about how we broke parcel tracking at DHL and the disclosure process of the identified problems. As DHL is not the only parcel service in Germany, we also investigated the other available parcel services. In this blog post, we want to talk about DPD, also called Geopost, which belongs to the French Post Office.
Efficient Guessing of Tracking Numbers
DPD uses the recipient’s ZIP code to unlock detailed shipment information and additional options. After trying some ZIP codes manually, we received CAPTCHA prompts in the web interface (more on this later).
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