Thanks to reader “xiaoducaizhe” for this information. When he tried to downgrade his AmEx Platinum Delta SkyMiles to the Gold SkyMiles, he was told by an AmEx CSR that: AmEx recently built a new team to deal with all the product change or downgrade, effective 2017.06.01. Previously any AmEx CSR can deal with product change or downgrade, but from now...
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By physixfan