Form 8300

In order to protect your dealership from accusations of “money laundering” by the IRS, anyone taking a cash payment of $10,000 or more is required to file a Form 8300. Every time. And you must file Form 8300 by the 15 day after the cash payment occurs. Every time.

Protect yourselves from IRS scrutiny here:

https://www.irs.gov/businesses/small-businesses-self-employed/form-8300-and-reporting-cash-payments-of-over-10000