Self destruct template?

[Alf12345]

It sounds a bit silly, I know.
But the thing is, that as a consultant, I bring to my clients many templates they can use 'during' the time I work for them.
Many clients want to keep using my templates but unfortunately, I also experience that my templates get copied and shared without my permission or compensation for the hours, weeks and months of work I put in them.

Therefore, my question is;
"Is there a way that I can put;

1. a time limit on usage of the template? (e.g. expiry date, after which it can no longer be used or opened)
2. a self destruct (hehehe) so that the template can no longer be used?
3. a lock with encryption that changes every 3 months or so?
4. a 'tab' lock (other than the general 'protect/unprotect'?
5. a code or formula that prevents sharing or copying?

Or some other mechanism I am not aware of?

Any help would be appreciated.....

 

[Alf12345]

That's great info
Although being a novice in this field, I will certainly try it.
Thanks

 

[vletm]

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