supplementary card holder do not right to transfer points. if you read the T&C, it is only be able to transfer to your own FF account.
But, if all you want is to transfer to another SPG account, just do it within the SPG level. 2 SPG accounts that has the same address for 30 days or more can submit the transfer online on the SPG web site yourself.
- Login at
www.spg.com
- under "StarpointsŪ Awards", click "Redeem/Transfer Starpoints"
- last option "Transfer to Another Member", click "Transfer Form >" link
or login from the link below:
https://www.starwoodhotels.com/prefe...nsferForm.html
Thanks for this information! This is very useful.