To meet the standard in full, you report as fully as possible and honestly on your impact. You ensure that you check the accuracy of the information you report. You lay out relevant and unbiased findings based on reasonable interpretations.
Always try to report on the impact of your social enterprise in a balanced, accurate and honest way.
To be considered as credible, your evidence will need to be presented in a way that stakeholders regard as believable, trustworthy, and relevant to answer their questions. Credible evidence will add strength to your results as well as the recommendations that follow from them.
Sometimes it can be helpful to get others to verify that the evidence you produce has been competently gathered and reasonably interpreted. Think about whether there are people whose opinion you value and are credible to others, and whether they would be willing to review your work (checking the data, calculations and assumptions) and make public comment on it.
While a combination of internal checking and independent verification can be beneficial, you should ensure that this does not add an excessive burden or costs to your impact reporting.