OpenTable is a real-time online reservation network for fine restaurants. But when you’re not using the service anymore, you might be considering to close your account. In that case: I can tell you that all it takes, is a small email to their info email address.
I’ll show you below the one single thing you need to do to remove yourself from their network (and their answer to it). It will cost you less than 2 minutes to have your profile closed:
1 Write an email to firstname.lastname@example.org
Send them an email that looks like this:
Subject: Request to delete my account
Dear customer support of Opentable,
I accidentally created an Opentable account and want to close it.
Email associated to the account:[your email address]
Thanks in advance for helping me out.
In my case, I received an answer 2 days later, confirming me that my request has been processed and the profile has been deactivated.
Source (& thanks to): Customer service team of Opentable.com