Hello All,
It's important all review this FAQ
https://logotournament.com/help/client/27Reference You Own: this is reference that is 100% your property or that of your client. eg photos, artwork etc. Designers may incorporate such imagery into your logo as a derivative work.
Reference You Do Not Own: this means that Designers may not use the image in any way that the copyright holder may view as violating his or her usage right. eg. car dealers or charity events using a parent company or sponsor logo.
If you represent the copyright holder, you should explain that clearly and provide the relevant vector file for Designers to use and explain any limitations or restrictions on how it may be used or displayed.