Persistent late payer.....

When a company persists on paying at 90 days after being told that our terms are 30 days (we factor and so cannot change from 30 day payment terms as it is part of the deal) are we entitled to charge a £40 fee for every late paid invoice even after that invoice has been paid ?

The Co. in question has gone elsewhwere for fulfillment of the service we offer as they have a new broom in the purchasing dept who has "benchmarked" our service to them and decided that they will pay us less than we...

Persistent late payer.....