The Women Against State Pension Inequality group is organising a mass-mailing to the Department for Work and Pensions in the hope it will lead to formal complaints to the Parliamentary Ombudsman.
The group, which wants transitional measures for women who have seen their state pension age increase, provide an email template and detail how to escalate the complaint.
The complaint centres on the lack of adequate notice given to women born in the 1950s. The letter says the DWP is “guilty of maladministration in the way the changes have been introduced”.
A posting on the Waspi website says: “We want to cause such a high volume that it will further compel the Government to look in earnest at making remedy for the ‘grotesque disadvantage’ and financial loss we have suffered.”
Last week former Pensions Minister Ros Altmann said in a letter to Prime Minister Theresa May that the government had not “adequately addressed” the Waspi issue.
She wrote: “They were not adequately informed. I also believe we must devote resource to widely communicating and publicising the coming changes to state pension age for both men and women.”
According to Waspi, the group is planning to launch a national publicity campaign in the coming weeks.