If you received an income support payment (e.g. parenting payment, newstart allowance, DSP, carers payment, austudy, youth allowance, age pension) you will receive a group certificate - I'm not 100% sure but if you haven't received yours you may be able to print it or request a duplicate via the C'link online services. You will not receive a group certificate if all you received from C'link was FTB.