Aspen police would like to talk to the person who left something behind on the self-scanner.
It's not something sold at the grocery store, as far as we know. Police called it a "white, powdery substance."
Police said it's in a really small bag.
"Note that the scale couldn't even weigh it," Aspen police wrote on Facebook.
Officers said, "The owner of said bag probably really didn't mean to leave it behind."
Police would like to talk to the owner and are offering to let the owner come and get it.
"If this is your property, we're going to leave it up to you to come and collect it," police wrote with the hastag #Aspenproblems.
See the full size picture of the item and read the entire Aspen Police Department's post on their Facebook page .