When acknowledging NEWFELPRO as the source of financing of a particular project (in an article, presentation, etc.), please use the following sentence:
"The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7 2007-2013) under grant agreement n° 291823 Marie Curie FP7-PEOPLE-2011-COFUND (The new International Fellowship Mobility Programme for Experienced Researchers in Croatia - NEWFELPRO). This [ presentation/article/etc ] has been [ written/prepared/etc. ] as a part of a project " [ title of the project (acronym of the project) ] " which has received funding through NEWFELPRO project under grant agreement n° [ no. of the particular GA ]."
You can find all the logos which you need to use at the following link