Create custom gift voucher (PDF) after purchase

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.4

Hi,

Is there a way with Hikashop (maybe with an extra plugin) to automaticaly create a gift voucher after purchase ?

I already have my PDF template, I just need to add "gift voucher valid until XXXX", where XXXX is the purchase date + 1 year (exemple : customer pays 1/1/2017, my gift voucher will say "gift voucher valid until 1/1/2018)

Thanks !