Read this flyer from the EPA at the following link.
Government official do from time to time check yards to see if they are keeping the required paperwork for disposal of refrigerant. If a particular customer is frequenting the same yard and delivering appliances they will be checked to see if they are licensed for demanning appliances and if you are not you could be subject to a fine.
This pertains to all metal recycling
yards in the United States. There could also be state and city regulations that a particular yard must follow in addition to the federal regulations.
Pay particular attention the area labeled "Verification of Refrigerant Removal Prior to Arrival at Landfill"
This is a copy of what every yard in the United States is supposed to do pertaining to keeping records.
You must maintain copies of these documents on
site for at least three years. This documentation
• A signed statement from the customer that
sent the appliance for disposal stating that all
refrigerant has been removed from the appliance
in accordance with the standards listed in EPA’s
• The name and address of the person (for
example, an appliance retailer) who removed the
refrigerant and the specific date the refrigerant
was removed, OR a contract that refrigerant will
be removed prior to delivery.