I have an SPG account and a Marriot account. I have just updated my email on both and now I want to merger them. How do I do that?
You can link your marriott and spg accounts below:
Link Marriott and Starwood Accounts | Marriott Rewards
You cannot merge them (yet) though as the new program has not been announced / launched yet. The new program (whatever it is called) will be launched around mid-2018 or even as late as 2019. Hope that helps.
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