I think a temp certificate is good for 120 days from date of issue. Every time I got a new one the inspector or examiner told me to call them if I didnt reciee the permanent copy after 90 days.
Until the temp expires, it is the same as a regular ticket. In other words, you can do everything wit it that you can with a permanent. If your employer retains a copy of your license, which all seem to do, then they will need a copy of the new certificate when it arrives.
I hope this helps.