I just discovered some of my files on clipdealer, but never uploaded to them. Are they associated with other agencies I upload to or are my images stolen?

I believe they aren't partners of any agency

my 123rf content appears there.

I have asked them few weeks ago (CD)  - they sant me  e -mail explaining that they are partners with 123rf

Good to know ... thanks for your answers!

ClipDealer re-distributes Artist footage to many small unknown agencies to sell. In many cases they actually transfer the files to them and not just a link to the CD data. When they re-distribute your footage the credit is a different name than ClipDealer or your own. It does appear that the footage is stolen but CD says they are affiliates. Sales are all but non-existence.