Sign app in XCode with another developer account

Question

I have a client that doesn't want my apple developer account to interfere with his application. So, can I use his developer account(without the credentials) to sign and test an application?

I searched and I found myself lost with some questions over a possibility that I'm not sure it works. The thing I found was him exporting the developer profile via XCode, sending me the developer profile file and me importing that into my XCode. What I did not understand, however, was:

1. will this thing work?
2. will I need his account id and password for importing this, afterwards? (because this would be a problem)
3. is it required for him to generate this through XCode or is there any alternative?
4. can we both use this after he exports the file and I import it? is he able to revoke me after this is finished?

Edit: Is there any other way to acheive that? Maybe any third party application?

Answer 1

It is very easy :

Get the p12 of his certificate : he could export from his keychain then install this certificate and adhoc provisioning profile in you system. You can use this for taking build .