This is a matter for your printer, not Word per se. If your receipt is page one of your document, and the Terms and Conditions are page 2, you simply need a printer that will print on both sides ("duplex"), or, you can print one side first, flip the paper, and print on the back. In this second process, when you send the document to print, make sure your sursor is somewhere on the first page, and, in your print options, choose "Print this page only", or "Current page", or "Page 1", however your printer specifies this. When you are ready to print the second page, have your cursor on the second page, and specify it in the same way.

Does this solve your problem?