Just heard this back from Organigram:
With regards to transferring your prescription, as I suspected, you absolutely can demand your prescription back to send to your preferred provider. In any event, though we cannot speak for other medical marijuana providers, that is how we here at Organigram tend to such demands; should you, after having registering with us, make a demand for your prescription back, we will be more than obliged to comply with your demand without question. As to how Mettrum handles requests for returning prescriptions, we cannot speak for them. If they do so wish to not return prescriptions, I’m afraid that is their decision to make.
I really do like the Organigram company but I also am not sure that I want to wait until August and then have access to just one strain (which is one I've not tried yet - first one out is Mongolian - so I don't know for sure if it will be helpful) for several weeks.
I think it is, not only more ethical, but also a better marketing strategy to be willing to return the original document to clients.