Originally Posted by Amex Customer Care

Hi FlyerTalkers,

If you are referring to depositing money into your High Yield Savings account it would not increase the line of credit.

Normally, you are able to request a line of credit increase every six months. If there was an issue with the request, it is possible that we can review the account and see if it can be processed. We will need to be contacted directly via Secure Message to see if the increase can be processed:

www.americanexpress.com/messagecenter

Please be sure to address the email, Rachel/ Social Media so that it is reviewed by the correct people.

I hope the information provided is helpful and looking forward to assisting.

Rachel
Amex Customer Care