yup! the things you should include in your letter are the date that you hand it in, clear wording saying it is your 2 weeks notice with the last date you can work being there as well, and your name + signature. you are free to add any details beyond that as well!

if you want an example of formatting, this is along the lines of what your letter could be:

“[the date that you hand in your notice]

Hi X,

I’m writing to let you know that I have decided to resign from my position as barista [or whatever your position is]. Please consider today, [insert date], to commence my final two weeks, with my last day being [insert last date]. Thank you for providing me with this experience, and I appreciate the time I have had here!

Thank you,
Your Name
Your Signature”

and as for the text:

“Hi X, I wanted to let you know that I’ve chosen to hand in my 2 weeks notice effective today. I left a letter with more details on your desk!”

i know it’s super scary to have to do this and completely understand where your anxiety is coming from — just know that your manager has seen a lot of people quit, and being notified of someone handing in their 2 weeks is very par for the course for them.

I would leave your hard copy in a sealed envelope addressed to the SM and tape somewhere eye label above the back desk. That way you have a reasonable expectation of privacy and then text your SM where you left your resignation.

Also if you want further protection email a copy to your sm and bcc yourself. The text provided is excellent.

I would personally email so there's a record of it. Text message accomplishes that too but its kinda tacky.