Hello, have you seen the Sage.Peachtree.API.Contact Class and Vendor.Contacts Property? Thanks!

Yes, I checked everything.

Actually, the .net SDK looks not stable, some properties are not visible or exposed. For example, AdvanceReceiptFactory (if prepay) does not have ReceiptNumber property so can not get the receipt number. 

Thank you anyway.

Maybe if we could see how you're using the VendorFactory Class that might help with figuring out where to go.

Also an idea of what you're actually trying to accomplish.