Yup it is. I done it multiple times
"Dear Steven,
Sure. We will be happy to help you with this.
To request for a Card transfer, please call us at 1-800-528-4800. If you are outside the United States, please call collect at 1-336-393-1111. We will be happy to assist you.
Manager, Email Servicing Team
American Express Interactive Services"
so they dont let you downgrade by sm anymore? did I sm the wrong dept? I sent it to "Account Management & Statements-All Other Questions"
or did they not understand my request? I wrote "Hi, Can you please downgrade my business platinum card to a regular business gold card? Thank you in advance,"