How To

How to delete your RapidShare account

No letter could be found about account deletion. So perhaps the best to do: use the link to write them an email or ring them, requesting deletion of your account.
By the way, your account will also be terminated in case of violation of their Terms. So be careful what you do, definitely if you have a paid account.

UPDATE: apparently you can get your account deleted using a trick suggested by one of our visitors. Read the comment below.