How long is my Refer a friend discount code valid for? You have 180 days from the date your Refer a friend discount was issued. Related articles Do I still receive the 26% Subscribe & Save discount when using a Refer a friend discount? What are the Refer a friend terms and conditions? If I have referred a friend when do I get my reward? Is there a limit on how many friends I can refer? How to pick the right size nappy for your baby?