A couple of days ago, I received an email from Nextdoor inviting me to my neighborhood group. It had my real name and was sent to the email address that I only

A couple of days ago, I received an email from Nextdoor inviting me to my neighborhood group. It had my real name and was sent to the email address that I only use for business.. I never use it to sign up for services or anything with a privacy agreement. I sent an email to privacy@nextdoor.com that simply read "Please tell me how and when you obtained my personal information, and then promptly delete it from your systems." Surprisingly, I received a response within 24 hours: "Hi neighbor, Thanks for your email. From time to time, Nextdoor receives information from third parties about non-users. In your case, we received your information from a third party partner and used this information to invite you to join your Nextdoor Neighborhood. We’re sorry to hear that this email was unwelcome. I can confirm that we have deleted your personal information from our systems. Let me know if you have any questions. Best, Maureen Nextdoor" I responded: "I'd like to know the name of the partner and the date of the transaction, please." Their response 4 hours later: "Hi XXXXX, Thanks for your reply. In keeping with our legal obligations, including our obligations under US privacy laws, we can only inform you that we received your information from a third-party partner. Unfortunately, we are unable to provide you with additional details at this time." It's incredibly frustrating. I just want to know who sold me out so I can avoid doing business with them in the future.