You will need to complete 3 shops with a minimum value of £50.00 each before the 30th of May. For each shop you will get 200 extra clubcard points and if you complete the 3 shops in the required timeframe you will get a bonus 400 points.
Remember the clubcard points can be traded for four times the value in Tesco Deals vouchers for things like Pizza Express!
Here are the codes:
200 Points on groceries. Code: XXLB4W Expires 20th May 2010
200 Points on groceries. Code: XXLB4W Expires 20th May 2010
200 Points on groceries. Code: XXLB4W Expires 20th May 2010
Use all 3 and get a bonus 400 points!