Form 4684 Ponzi scheme "Type of property " I fill in type and says leave it blank. ???

[MonikaK1]

Ponzi scheme losses are accounted for in a different section of Form 4684 than losses involving property:

SECTION C—Theft Loss Deduction for Ponzi-Type Investment Scheme Using the Procedures in Revenue Procedure 2009-20 (Complete this section in lieu of Appendix A in Revenue Procedure 2009-20. See instructions.)

The entries in that section refer to investments rather than property.

See this thread for another discussion of Ponzi-type losses.

The scheme is defined in the following federal links.  It's important to review for your specific situation, the year of the known loss, recovery year or years.

• Help for Victims Of Ponzi Investment Schemes - Click the FAQ links as well.
• The Revenue Procedure 2009-20 is the simplified compliance. 

You will use Form 4684, Section C to claim your loss if applicable. Note that recovery in a future year will be income after taking the loss.