Some banks fail to give ISA customers the proper advice on moving their money.
A mystery shopper style investigation has revealed that some high street banks do not have enough knowledge on cash ISA transfers.
The quality of advice on cash ISAs provided by banks and building societies is shockingly poor, according to a consumer website study.
Which? Money carried out an investigation on the level of advice lenders provide to customers who want to know more about ISA transfer rules. Thirteen of the top ISA providers were called by a selection of mystery shoppers who asked them four simple questions, such as 'how do I transfer my ISA?' and 'how much can I transfer?'