When does my employer coverage actually end? after 6 years as a data-entry clerk

I was told my coverage ends on my last day, but the letter says the end of the month. I do not usually post, so bear with me. The letter is unclear about dental and vision. How did you confirm your end date?

Thanks for writing this out. I went through something close to it 6 months ago, and it got easier once I kept a simple log of every call and form.