As a default - no, only WU sees whatever ID they use. If you want to see copy of ID, you would need police intervention/investigation example: police report and such
I may be wrong, but I dont think they scan the ID, they most probably just do a quick visual check to ensure it is the named person collecting the money.
To send payment by Western Union you need the name of the person who will be collecting it as well as his city/state/country - so youll have this info already and unless that person gave you ⊗⊗⊗⊗ info and is collecting it with a ⊗⊗⊗⊗ ID you have their proper info anyway.
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AGED SUPER HIGH LIMIT ACCOUNTS: 10,000/$1,000,000 and 25,000/$500,000