 Re: Sales Invoice Disclaimer/Agreement
Think about the kinds of things people who get your t-shirts could sue you for and then put a disclaimer saying they agree not to sue you for these things.
You probably also want to say something about that they agree to pay your bill and the terms of payment.
You also want to disclaim any warranties and limit your liablity. Note, that states generally have laws regarding how large these disclaimers need to be. Usually, the rule is that the words Disclaimer of Warranty and Limitation of Liability should be in all caps and bold. For example:
DISCLAIMER OF WARRANTY: EXCEPT AS EXPRESSLY SET FORTH HEREIN, ABC MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OF FITNESS FOR A PARTICULAR USE OR PURPOSE OR MERCHANTABILITY.
LIMITATION OF LIABLITY: IN NO EVENT SHALL ABC BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OF ANY KIND, INCLUDING WITHOUT LIMITATION COMPENSATION, REIMBURSEMENT OR DAMAGES ON ACCOUNT OF THE LOSS OF PRESENT OR PROSPECTIVE BUSINESS, PROFITS, EXPENDITURES, INVESTMENTS OR OTHER COMMITMENTS, WHETHER MADE IN THE ESTABLISHMENT, DEVELOPMENT OR MAINTENANCE OF BUSINESS REPUTATION OR GOODWILL, FOR COST OF SUBSTITUTE PRODUCTS, COST OF CAPITAL, OR FOR THE CLAIMS OF ANY THIRD PARTY, OR FOR ANY OTHER REASON WHATSOEVER, EVEN IF ABC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS OR DAMAGE. ANY DAMAGES THAT ABC IS REQUIRED TO PAY FOR ANY AND ALL CAUSES, WHETHER FOR NEGLIGENCE, BREACH OF CONTRACT, OR OTHERWISE, AND REGARDLESS OF THE FORM OF THE ACTION IN THE AGGREGATE, SHALL BE LIMITED IN AMOUNT TO THE PAYMENTS MADE BY THE PURCHASER TO ABC FOR THE SPECIFIC PRODUCTS TO WHICH ABC’S LIABILITY RELATES. | 
