Stormpath currently supports resending account verification emails via the REST API. Support for this functionality will be added to our language SDKs on a rolling basis.
However, unlike password reset tokens, account validation tokens do not expire. So long as the recipient does not delete the email, they will be able to activate their account with the original verification link.
If you have any questions about configuring the Account verification workflow or concerns about deliverability, please direct them to firstname.lastname@example.org