In her resignation letter, Ussher claimed that she had done nothing wrong and that her actions were "in line with HM Revenue and Customs guidance and based on the advice of a reputable firm of accountants who in turn were recommended to me by the House of Commons fees office". She also denied any abuse of the allowances system of the House of Commons. Four years later in an article on her blog, she said she had nevertheless voluntarily paid the amount in question to HMRC, stating that "Public servants should always be at pains to ensure that they are not only compliant with the letter of the law but also with the spirit of it, and I did not focus on that."