A 47-year-old was refused booze by a supermarket because she might give it to her daughter – who's 21.
Susan Young has vowed to boycott the Morrisons in Leeds where she has shopped for 25 years saying she was "humiliated" by the incident.
* Sign up to free news and sport email alerts from Middleton Today.Mrs Young wanted a bottle of Bailey's for her mother's birthday but
left the Merrion Centre store red-faced and empty-handed with daughter Emma.
* Click here for your Community Directory, where you will find basic information on a wide range of local community groups and organisations.The teaching assistant from Middleton said: "There was an offer on for Bailey's which my mum loves.
"I put the bottle on the conveyor belt and sent Emma to put it in a bag.
"The cashier asked my daughter for ID. I said 'I'm buying it' but the girl said we need ID for her. I said we haven't got any but that my daughter was 21.
"The cashier took the Bailey's off me and said: 'Sorry, I can't serve you' and added: 'When you got home you might let her have a drink'.
"I felt I was committing a criminal act – there was quite a queue behind me.
"I was so humiliated. I don't want to give them my patronage any more."
Last week the YEP reported that Polish student Joanna Blaszcyk, 24, had her national identity card refused at the same store when she tried to buy wine and rum.
The Bradford-based chain tells staff to ask any customer they believe is under 25 for proof of age.
Stella Pitt, the chain's stores PR manager, said regulations banned alcohol sales to adults they believed may intend to supply to minors.
"These rules are in place to protect our customers and their families, as well as the general public as a whole.
"In this case, only one of the two customers was able to provide appropriate ID. As it was not possible to establish who the product was intended for, the store used its own judgment and refused sale.
"We apologise if the customer felt the store was being over zealous in applying rules."
Mrs Young, who also wrote to complain to Morrisons, added: "I would
have thought as a teaching assistant I was responsible enough not to give minors drink. Why wouldn't they just take my word for it? The worst thing was the girl serving us didn't look any older than my daughter."