It was a human.
A woman delivering a package for Amazon got out of the truck, relieved herself behind the passenger door and left the feces on his driveway, the horrified homeowner told Fox News.
Nemy Bautista got on Facebook and lodged his complaint about the stinky "package" left behind. He also shared a photo for Amazon to see.
"Amazon.com Why is your driver squatting in-front of my house? Let me give you a hint ... he/she is not tying their shoes. I have it on video!" he wrote in the post.
The delivery woman worked for a third-party contractor of Amazon, CBS Sacramento reported.
Hours later the worker's supervisor arrived "unprepared" to clean up the dump site.
"He was in shock when he saw the size of 'it'. He ended up scooping it up with a plastic bag, but didn't want to take it with him (it smelled really bad). Guess the garbage can will smell like s**t for the next few days. I also had to hose down the gutter/sidewalk area after he left," a disgusted Mr Bautista told CBS in a statement.
He also got a call from an Amazon customer care executive who apologised for the unpleasant package left behind and even compensated him with a gift card.
In a statement to Huffington Post, the e-retail giant said, "This does not reflect the high standards we have for delivery service providers. This individual is no longer delivering Amazon packages and we're in direct communication with the customer."
The story also made national news in America.
Click for more trending news