Passers-by were stunned to be told the bank's first-aider could not help because they are not allowed to give first aid outside the branch.
A woman who collapsed outside a bank was refused help by staff.
Passers-by pleaded for a trained first-aider to assist the female in her 50s, who had severe breathing difficulties.
Conservative Councillor Stephen Paine, who went to the woman's aid, said: "I was dumbfounded and tried to appeal to this lady's humanity.
"Surely first-aiders are just that, the first point of call when needing emergency aid? The lady was only a few metres outside the branch."
Paramedics came to the woman's aid in Maidstone, Kent.
Bosses admitted it was cautious about staff giving help, even to customers in its premises, as the first-aider could be sued.
A spokesman said: "Given UK laws, a first-aider providing care is held responsible if something goes wrong. The employee would then be liable and not the bank!"
A manager commented: "If we'd known at the time that it would have been the First-Aider who got sued in the event of anything going wrong, and not us, and they were willing to help, we would have allowed them to."
Perhaps William Hagues wife Ffion, as a paid advisor, could have told them?
Diamonds aren't they at the bank?
A right bunch of Bankers!