The Messenger صلي الله عليه و سلم warned us that people will fabricate hadiths and ascribe them to him. He also branded the person a liar who relates everything he hears. Therefore it is imperative that we scrutinize the chain of every hadith we narrate or rely on the research of reputable muhadditheen in this regard.

Below are links to some very important resources on this issue.
 المقاصد الحسنة في بيان كثير من الأحاديث المشتهرة
Author: محمد بن عبد الرحمن السخاوي

Download here:
https://archive.org/details/waq40832
 
 
 
 
 
كشف الخفاء ومزيل الإلباس عما اشتهر من الأحاديث على ألسنة الناس 
Author: إسماعيل بن محمد العجلوني الجراحي

 
Download here:
https://archive.org/details/KashfulKhifaa