SEATTLE (AP): Some Starbucks customers have been giving their name to baristas as “Black Lives Matter” in an effort to help spread awareness of the movement.

Lex Cross posted a picture of his Starbucks receipt with the name “#blacklivesmatter” on Facebook last week . The Seattle man writes in the post that he changed his name on the Starbucks app, “so the barista has to shout it to a room full of people” when his order is ready.

The post has been shared 50,000 times and several other social media users have followed suit. One Instagram user put up video of a barista calling out the phrase. She adds the note, “Acknowledge us!”

Seattle-based Starbucks hasn’t responded to a request for comment.