Stock Image Licencing.

Hi All,

This may have been previously asked but I can't find anything that answers the question I have. 

Essentially, I work for a company that produces off-the-shelf learning materials, and we utilise stock images (such as those from Shutterstock) to bring our courses to life. 

We've been contacted by a client who would like us to create some bespoke modules for them. Normally, this isn't an issue as we would be the host of the content on our own LMS; as such, we are able to retain access to the imagery, and as a by-product, our licence covers this.

However, the client has requested not only access to the course output, which will be available on their own LMS, but has also requested the Project (SL360) files in order to maintain the courses themselves moving forward. 

My question would be has anyone experienced this before (I know there must be hundreds of freelancers here) - If so what can you tell me about stock licencing issues that may be encountered when attempting a project of this nature, furthermore, if anyone has any experience in doing the above what are some potential pitfalls to watch out for? 

Thanks in advance. 

John.