Letting people stop transactional mail

The question of putting unsub links on transactional messages came up on multiple lists recently. As with any question that has to do with email and controlling it, there were a lot of different opinions.
A number of people believed that transactional mail should never, ever have an unsubscribe. Their argument was that transactional mail is too valuable to allow recipients to unsubscribe from it.
Other people argued that the recipient should always be able to stop mail and that an unsub link was important, even in transactional mail.
A third group pointed out that under CASL transactional mail to Canadian residents may have to have an unsub link, even if the sender doesn’t want to add one in.
As with most questions, I don’t think there is necessarily a single answer for every mailer or sender.
There are absolutely cases where transactional messages should have an unsubscribe. Twitter notifications and Facebook notifications are just some of the examples of mail a lot of people just want to stop.
But should companies allow recipients to unsubscribe from receipts? Some people feel very, very strongly that recipients should never be allowed to unsubscribe from receipts.
The problem with that stance is it ignores the fact that people don’t always correctly type their email addresses and end up giving the address of another person as part of a purchase. Al found a report at the Consumerist where someone is getting flooded with receipts for Nook books she’s never purchased.
This isn’t the first time this has happened, not by a long shot. In fact, in the past year I negotiated a Spamhaus delisting for a very large company that wasn’t confirming email addresses of their customers. This company sells a service that sends email alerts triggered when certain actions happen. Because they were not confirming their customer’s email addresses, they ended up sending alerts to spamtraps. The alerts triggered a SBL listing.
I don’t think that the Nook owner or the alert purchaser are actually malicious or that they purposely gave the wrong email address to their vendors. But it happens, and it happens not infrequently.
What do I recommend?
Transactional mail that is only ever a single event and where that address is not associated with an account don’t need to have an unsubscribe link. If it’s a one-time email, then it’s OK to not have an opt-out link. It’s OK to have an opt-out link, but not necessary.
Transactional mail that’s associated with some sort of account should have a process in place to make sure that mail is going to the right person and if it’s not, that the wrong person can make the mis-directed mail stop. There are multiple ways to do this. One is to confirm the email address associated with the account during the account creation process. Or you can allow anyone receiving the mail to click on a link and opt-out of receiving mail.
Whatever it is, it needs to be effective and protect everyone involved. Requiring the victim recipient to hand over a bunch of personal information, like Virgin Mobile does, helps no one. Continuing to send purchase receipts to an unrelated third party is poor business practice, particularly when you’ve been informed that this is the wrong person.