Reading between the lines, you want a template which when used will create a
unique reference for the resulting worksheet?
You could use a macro to run when the new file is created which concatenates
some data such as Author's initials and the time of creation in milliseconds
and turns it all into a serial nunber.
I've used a similar technique to tag different sheets of a workbook with a
non-obvious (but not crytpographically hard) numeric serial number to ensure
that the printed pages could be cross-referenced (this was to avoid someone
printing a cover sheet with a lower value for purchasing signoff than the
attached breakdown pages).
I used last print time / date rather than creation, plus some other bits
which I forget but basically to avoid the tiny possibility of two people
printing at the same moment and getting the same number.
It depends if you just want something which is pseudo-random to prevent
people making up their own, something sequential, something meaningful or
what. You might want to post more info if you want better answers...