@Vlahka
On IMVU if you are sending credits to any of your friends or whoever you want to send, if you are doing it first time, you need to verify your primary email account mapped to to your imvu account. best way would be to verify the email account from the imvu webpage link that will generate verifying link and will be sent to your email that you can open and verify. Once you have verified your primary email id that you had shared at the time of opening an account, you will be enabled to send the credits to the limit of 10K credits for security reasonsf and you will be able to send only once a day and have to wait for 24 hours for next lot of 10K credits.
I have done it many a times and this is how it works. best of luck