The "unsend" message feature will allow users to recall messages, something that they can't do right now.
Facebook later claimed they were retracting these messages in an attempt to "protect [their] executives' communications" following the Sony Pictures email hack in 2014. Executives in the company, like Zuckerberg and others, have seen their old messages deleted.
"We are working with third parties to develop a list of key issues, which we will refine over time", Rob Goldman, vice president of Ads, and Alex Himel, vice president of Local & Pages, wrote in the Friday blog post.
It is not clear how the feature would look like, but Facebook already has an encrypted messaging feature that includes an Unsend expiration timer.
But the lack of disclosure has angered some Facebook users, as has the absence of any similar tool for normal users.
"From now on, every advertiser who wants to run political or issue ads will need to be verified". The company did not specify what number of followers would trigger the requirement.
Moscow has denied the allegations.More news: Facebook says it should have audited Cambridge Analytica
The move is meant to clamp down on fake pages and accounts that were used to disrupt the 2016 presidential elections in the US.
Senator Amy Klobuchar is sponsoring a measure requiring more transparency in political advertising. "I don't know why. they "trust me". dumb f**ks" Zuckerberg replied.
That legislation is aimed at countering concerns about foreign nationals using social media to influence American politics, which is part of the investigation into possible Russian meddling during the 2016 USA presidential campaign.
Facebook says page administrators and advertisers will be asked to provide a government-issued ID for verification. "What we are focused on is making sure those possible use cases get shut down".
This news comes after Facebook spent months downplaying its role in Russia's interference with the 2016 presidential election and days ahead of Zuckerberg's testimony before Congress, when he will be grilled about the Cambridge Analytica data scandal.
"Facebook never publicly disclosed the removal of messages from users' inboxes, nor privately informed the recipients".
Australia on Thursday said it had begun an investigation to decide whether social media giant Facebook breached its privacy laws after the company confirmed data from 300,000 Australian users may have been used without authorization. At that time, Sandberg said the company took no action because it believed Cambridge Analytica had deleted the data on its own.