Betterment requires that you mail them a hard copy of your signed transfer form and account statement.
Once you have a copy of your Transfer-of-assets bundle, you can print and mail it via Mailform to the Betterment address below:
Note: This mailing address only accepts USPS Mailing Services.
Betterment Transfers, 61 West 23rd Street
4th Floor Reception
New York, NY 10010