Every year since 2010, Aeron Jones, a councillor for Llanwnda, near Caernarfon has bought Easter eggs to give away free to each pupil at the three primary schools in his ward.
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In the past he has collected the chocolate eggs from Morrisons supermarket, Caernarfon - not far from his work at Gwasg y Bwthyn in the town.
He normally fills his trolley, pays at the till and delivers them to schools Ysgol Rhosgadfan, Ysgol Rhostryfan and Ysgol Felinwnda.
Mr Jones said: "This year I filled my trolley with 165 Easter eggs; went to the till and was told 'You can only buy eight, it's company policy.'
"I explained what I was doing and giving them free to children, and asked to speak with a manager. The manager said: 'I can't deal with you differently or others will ask to do the same."
The councillor wanted to give every schoolchild in his ward a free Easter egg
Mr Jones said: "It was madness and ridiculous. I had an £165 order for a shop and they refused.
"She suggested that I buy eight, and go round again and buy another eight etcetera until I reached 165. It was fantastic business logic from this shop - 'I don't want £165 in one go but will take it £8 at a time'."
He walked away from his trolley and went to Tesco in Caernarfon instead where the manager allowed him to buy however many eggs he wanted.
Mr Jones said: "I never had any trouble previously. Perhaps the shop had not ordered enough eggs."
The Morrisons store in Caernarfon have since apologised
The councillor said he uses his own money, from travelling allowances and the £13,500 he gets as a councillor to buy the £1 eggs.
He said he also buys £5 vouchers for primary school children, which they can spend on books or equipment.
"I think it's important that all the children have at least one Easter egg." Mr Jones added.
A spokesman for Morrisons said: "We apologise that we couldn't meet this customer's request this time but we are doing our best to meet orders for large numbers of Easter eggs from charities and schools."