When you give the OK to send an order to print this is confirmation that you have checked the artwork/design work and you are completely happy with all the design/artwork's images, wording, contact details, etc after this, production begins.
It's a very important part of the print/design process and it is YOUR responsibility as the customer, to check for any errors prior to printing. Please carefully check everything is right.
Just to clairify...
All content must be signed off by the customer. Full responsibility for any errors in content, written or visual, lies solely with the client. Bright Future does not accept any liability for errors once we get the OK to go to print. - Click here for T&Cs of Artwork Proofing