Went to Customer Services in Tescos to add points from 3 receipts given to me by my mother-in-law. Was told that I could only add two receipts at a time (not sure whether that'd mean per day, or if you can sneak back when a different person is on the desk) and that they also now had to be added within two weeks of date on receipts rather than a month. They have just introduced this policy apparently.
Just thought you might want to know. :)