Bruce Falck, the general manager of revenue product at Twitter, unveiled the new company policy for political ads in a blog post on Thursday. In line with its earlier pledge to tighten the screws on advertisers, Twitter is going to bar foreign nationals from targeting the US public with ads. In order to make sure that no third party outside the US attempts to influence the American political processes, Twitter will subject prospective advertisers, both individuals and entities, to a thorough vetting. The new guidelines require candidates, political action committees and all those registered with the US Federal Election Commission (FEC) to submit their FEC IDs to Twitter. Those who don't have any must verify their location by sending a notarized form to the company. To ensure that the applicants are actually within the US, Twitter will then return letters to their registration addresses.

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Moreover, the “profile photo, header photo, and website” of accounts used for advertising “must be consistent with its online presence and the Twitter bio must include a website that provides valid contact information.”

Only “certified” advertisers will be eligible to run ads on Twitter, Falck said. While the changes to the Twitter advertising policy will take effect in the summer, advertisers can already file for certification, he said.

Once the policy is fully enforced, anyone will be able to clearly discern political ads in user-generated content thanks to a mandatory disclaimer featuring the name of an individual or an organization paying for the ad. Moreover, if an ad is authorized by a candidate in a political race, it will also be shown in a tweet.

Back in October, Twitter announced it was setting up the ‘Transparency Center’ that would allow anyone to track the origins and see all background info on any ad currently running on Twitter. The center will be inaugurated later this summer, Falck announced.

The same set of measures has been introduced by Facebook as well. Rob Leathern, the director of Product Management at Facebook, wrot that identification and labelling policies similar to those touted by Twitter are taking effect on Facebook on Thursday.  Facebook will, from now on, store all political ads for seven years. The archive can be “reached by anyone in the world” through a link.