Interesting, so Citi will assign you a new HHonors number but won't tell you what is is...
Originally Posted by
notquiteaff
That is pretty much the standard procedure with any awards card I have seen.
The Citi application has this note next to the Honors Number field:
"Note: If you are currently a Hilton HHonors Member, please provide your member number on this application, otherwise a new HHonors number will be assigned upon approval of your Citi® Hilton HHonorsTM card."