App for customer with own developer-account. What do I need from him?

Hi,

I developed an app for a person with its own developer account. Of course he wants to upload the app through his account, so which profiles do I need from him for building?

Is it enough to get a distribution profile and build the app using this or do I need the developer certificate too? 

Thank you,

Rob

Ok he gave me a p12.certificate but I have no clue what to do with it…anybody??

Ok he gave me a p12.certificate but I have no clue what to do with it…anybody??