Non-repudiation is a legal term defined as protection against an individual falsely denying having performed a particular action. It provides the capability to determine whether a given individual took a specific action, such as created information, approved information or sent or received a message.
Social media platforms such as WhatsApp have a function which allows one to send a message to an individual or a group and DELETE the message from all the recipients leaving them with no evidence of what has been sent. This allows the sender to deny having sent such a message. Read-once messages which get destroyed upon being read can also be a breach of non-repudiation on Social Media platforms.
What is your view of these functions on social media platforms? Legally are they acceptable?