The postal union, the CWU, has said that its members will boycott sales of financial services in main post offices for nine working days from 21st November to the 30th.
There are the 372 Crown post offices, which tend to be the principal offices in the town.
The action WON'T affect the operation of bank accounts, foreign exchange or when customers in and ask directly for a service.
The boycott means that if someone comes in to post a parcel, for instance, staff will not try to cross-sell a financial service, such as insurance.
The biggest sellers at the moment are life assurance for the over-50s and credit cards. And there's travel insurance, of course.