The QR code will also have a URL to the squeeze page listed next to it, so that people who cannot scan the QR code can also sign-up.
My question is whether the opt-in should be single or double?
I usually prefer double-opt-in but am concerned that those on a mobile phone will not immediately get the confirmation email and click on it and then they will remain unconfirmed.
We will be running many separate campaigns for different clients on a single autoresponder account and I am concerned that we find the right balance between getting maximum sign-ups for clients and not getting spam complains which could put our entire autoresponder account in jeopardy
What do you do in similar circumstances? Single opt-in or double and why?