are you sure? my surname is 11 characters long, and has a space in it, plus a capital in the "wrong" spot
what advice are you seeking? how to register?
does it matter if you shorten the surname? or does it have to match some ID?
ps, i feel your pain! was setting up a bank account recently and it wouldn't verify my ID because when they autofilled the surname they capitalised the "van" part (I have a dutch surname, like van Damm) but on my ID the "van" has a lower case "v" and the second word has the capital. maddening. I had to go into the bank to sort it out. there are still far too many websites who won't allow a SPACE in your surname.