Why might you still want to write a resignation letter? Many experts believe that writing a formal or even a basic resignation letter when you're leaving your current job helps make you seem more courteous and professional. However, the real reason to write a resignation letter is to create a paper trail documenting that you have given notice (if your employer requires two weeks notice or some other amount of notice) on a certain date, and to formally kick of the process should there be any legal hiccups (quite rare) with incorrectly processing your final paycheck and last day of benefits.
How to write an excellent resignation letter. Whatever the language, the sentiment is the same: I'm outta here. However, as a professional person, you need to express that maturely and firmly__ideally, one that doesn't alienate anyone at the job you're leaving. I'm sure we all have that fantasy where we tell off everyone who wronged us on the way out the door, but that person in the fantasy/movie/TV show never seems to have to live with the consequences afterward.