The phrase "appropriate acknowledgement" means giving credit, recognition, or appreciation to someone or something in a suitable and respectful way. Full definition
And there are some nice references to the Star Trek legacy, along with appropriate acknowledgements to the late Leonard Nimoy and Anton Yelchin in the closing credits. (lights-camera-jackson.com)
If your project is approved, we expect appropriate acknowledgement (including logo recognition, mention in presentations and media), regular project updates as well as an interim and final report that evaluates the project based upon a development and results based framework. (aref.ab.ca)
In either case, an appropriate acknowledgement is mailed to the recipient and a tax receipt is issued for you! (rapsbc.com)