Preventing duplicate email sends
Our instance of Marketo uses an account number as a unique identifier instead of email address because multiple accounts can use the same email address.
The challenge is when we send them certain types of emails (birthday seems to be the biggest one). I can limit each person to only be able to run through the campaign once per year... the problem pops up when a member has multiple accounts. Marketo is treating individuals with three account numbers as three separate individuals (which is how the system is set up), but I don't want them to receive three birthday emails.
I was thinking it may be possible to create a smart list of duplicates to use as a suppression list, but how do I ensure they get at least one copy?
Has anyone else had something like this come up? Is there a solution?