If you ever mail a money order or check to the IRS use a mailing service that will track it like UPS or certified mail so you know it was received. I think money orders have tracking numbers on them that can be checked somehow. Ask the bank from which you purchased the money order.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
