Goodmorning,
The short answer is no - however there is a risk to taking that approach.
There are a number of variables that you should take into account before making that move.
Is this a current product that you have been providing or within the
APQP process to bring a product into your company?
Is this a Component or sub-assemble that is proprietary to your company? sometimes refered to as a "Black Box Operation" which means there are product characteristics or process characteristics that your company has trade secrets that you do not want your competitors to get their hands on.
An alternative answer can also be: Invite your customer to your location and review the print with them after a non-disclosure agreement is signed, if there are propietary issues.
Gain an understanding of the reasons that your supplier wants the prints - which is a fair question.
What is the rationale that causes you to hestitate in providing the prints? with CC's & SC's?
Good Luck,
Tom
