One practice manager in Gloucestershire said that her practice had paid the first bill, on the advice of its lawyers, and cancelled the contract in writing. 'But a few months later we received another demand for further payment as it had entered us in the next guide.'
It has since ignored all demands received from the company.
Another practice manager, from Devon, said the European City Guide - another title from the same company - had been 'hounding me for years'.
'It hasn't taken me [to court] yet,' she added, 'But I've had many letters.'
A doctor at a residential home in Middlesex said he had received demands for €983 from a company in Lisbon, Portugal, for including his name in the med1web. 'So far,' he said, 'I have paid nothing.'
Last week we reported that Novachannel, the company responsible for the alleged directory scam, had been raided by the Swiss government and its staff arrested.
It is understood to have earlier sold its directory business to another company in Portugal.
More news from 13 July
Twitter users support 'welovetheNHS' campaign
GPs warn walk-in-centre 'endangering patient privacy'
BMA explains NHS 2010 pensions choice
Swine flu increased GP workload by up to 400%
Call for parity between nurse and pharmacist prescribers