Assertions are representations by the management embodied in the financial statements. For example, if a Financial Statement shows a balance of $1,000 worth of Fixed Assets, this implies that the management asserts that fixed assets actually exist as on the date of the financial statements, the valuation of which is worth exactly $1000 (based on historical cost or fair value depending on the reporting framework and standards) and the entity has complete right/obligation arising from such assets (e.g. if they are leased, it must be disclosed accordingly). Further such fixed assets must be disclosed and represented correctly in the financial statement according to the financial reporting framework applicable to the company.