Dear Danzel,
You have asked for help in writing a warning letter. The heading of your post is longer than the main body of the post. However, the details provided are inadequate. Please confirm to us:
a) What was the occasion? Why the employee was assigned duties in the reception bay?
b) Was it a temporary assignment or it was a permanent transfer?
c) What is the nature of the duties of the employee? Is working in a reception bay area part of his duties?
d) How the instruction was passed? Was it verbal or written?
e) Since the employee did not work in the reception bay, what were the consequences? Was there embarrassment to the company's top officials? Did the company suffer any losses?
f) Is the supervisor empowered to allocate the duties in the reception bay area?
g) For not working in the reception bay area, was the employee questioned? What was his take? Where did he work at that time? Did any other supervisor or manager give him instructions to work somewhere else?
Unless we know the complete facts of the case, it will not be fair on the part of the members of this forum to provide you with a draft of the warning letter.
Thanks,
Dinesh Divekar