attach new subscription code to account

Hello,

Sorry for my reply. I'm only F-Secure user (their home solutions).

Thus, it is only unofficial feelings and suggestion.

In general, I think that it should be possible to check  "My F-Secure Account" portal.

For example, login into your "My F-Secure Account" portal -> switch tab to "Order/Payment" (or if there is an option to 'add' subscription code from first) and check if it is possible to use something like 'add subscription code' (or so).

With your certain situation -> I think that can be limitations.

For example, some of F-Secure official 'special promos' with restriction for 'only fresh users' (so, need to create an account from first with certain promo-code or subscription-code; or with specific place).

That is fresh account which pinned to special subscription.

I think that if it is your situation - maybe possible to try contact their direct F-Secure Support Channels (chat as example) for clarification: https://www.f-secure.com/en/web/home_global/contact-support

Did you want to attach subscription to previous F-Secure Account for avoid use of multiple mail-addresses? Or for avoid multiple F-Secure Accounts?

Thanks!