What steps do you take when checking a candidate's references?

To check the references of a candidate, I ask them to give me the details like the name and contact number of the manager or supervision of the last job. Sometimes candidates raise the question regarding the same, then I explain how important it is to check the references to make informed decisions. To begin the process, I send the resume of the candidate in question to the references and then call them to verify their history and behavior in the company. In this way, I collect some more information related to the candidate. In addition to that, I check for professional networking websites like LinkedIn to know more about the candidate and read the comments made by their colleagues.