I sent my renewal 2 days ago, but I forgot to print/send my Notifications sheet. My cover letter says I did include one. I didn't realize I forgot it until I was at the post office, and I was not gonna postpone sending it out for that reason. I'm assuming since it was optional it won't matter but it sucks that now I won't get any notifications

Can I request email or text notifications after the fact?
I'll just have to continue to check for updates myself, right? I should also receive snail mail with a receipt ..right?