Often, one visit by the police officers was not enough to clarify whether the people reported actually lived at the previously identified addresses. They then visited the properties a second or third time.

Often, one visit by the police officers was not enough to clarify whether the people reported actually lived at the previously identified addresses. They then visited the properties a second or third time.
Chief Superintendent Lukas Serafin and Jörg Lange, Head of the Social Benefits Fraud Unit at the City of Duisburg, stand in the stairwell of an apartment building and look up at the camera
IM NRW/Tim Wegner
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Often, one visit by the police officers was not enough to clarify whether the people reported actually lived at the previously identified addresses. They then visited the properties a second or third time.
Translated with DeepL.com (API Version)
In urgent cases: Police emergency number 110