I do diligence on a prospective buyer because I like to know who is on the other end of an inquiry/offer email. In general, most people will reply with their full name and email address. Some people may reply with a fictitious name or nickname to try and retain some level of anonymity. For the most part, prospects don’t completely obfuscate who they are.
For my inquiry forms, the only mandatory fields are name and email address. A person may use a fake name or nickname to shield their identity, but most won’t use a unique email address nor do they take the time to create one for the purpose of inquiring about a domain name.



