Scammers have been targeting Whanganui District Library members.
Whanganui Library services manager Nicholas Keene said he was alerted by a library in Hawke's Bay, whose customers reported the calls.
"Hopefully people just recognise it the minute they hear it and hang up on the spot," Keene said.
"This is a good time to remind people of all online scams, because it's peak market time for scammers.
"I don't think they're being specific about where they are calling or the library they're mentioning, they're just mentioning the word 'library', getting someone to pay $10 and getting their bank details out of them.