Can the application specify that it does NOT need to receive MICR characters?

Can the application specify that it does NOT need to receive MICR characters?

No.  Virtually all applications request the MICR data.

However, if you know that the item is not a MICR document, there is no need to try to read the MICR. 
You can just set the MICR text to a zero length string.

Ranger® - The universal check scanner interface
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