This is Colorado.
What could go wrong? Volunteers go door-to-door ‘ballot harvesting’ in Colorado:
https://www.washingtontimes.com/news/2014/oct/21/ballot-harvesting-by-colorado-campaign-workers-rai/
Rule 7. Elections Conducted by the County Clerk and Recorder:
https://www.sos.state.co.us/pubs/rule_making/CurrentRules/8CCR1505-1/Rule7.pdf