This is the one i have:
Date
Re: Name of employee
To Whom It May Concern:
This is to comfirm that ___ is employed by __company__ since _date_ as __position__.
__simple intruduction of your complany and your team__
__Name__ has a strong background in __SKILLs__, She is responsible for __FUNCTIONS__, __OTHER SKILLS__.
If you need additional information or have any questions, please email __HR_email__ or contact __Phone#__.
Thank you in advance for your time.
Sincerely,
Name of person signing.
Title