You might have seen at weddings, that a wedding gift in thr form of cash is handed over to the bride’s/groom’s parents in a decorative envelope, having a 1 rupee coin taped in the front. This 1 rupee coin speaks more than it shows. In the envelope, one can simply insert a currency note of desired amount and the adjoining 1 rupee would render it to be a Shagun or a wedding gift for the happiness of the family. That 1 rupee is what differentiates a simple note from Shagun.