Side letters, when entered into in conjunction with a contract, can contain additional terms or conditions that are not disclosed in the primary contract. In the context of financial reporting, a side letter could potentially impact the accounting treatment if it modifies the terms of the initial agreement. For example, if a side letter changes the economic substance of an arrangement, such as adjusting the fees, payment terms, or other key aspects of a contract, it may need to be considered in the accounting for the original contract.

In the case of a side letter altering the original contract's economics, the combined effect of both the original contract and the side letter should be reflected in the company's financial statements according to the applicable accounting standards. This is particularly relevant in situations where there might be a change in the consideration or performance obligations due to the side letter.

However, without specific details about the side letter in question, it's not possible to provide a more detailed analysis. If the side letter involves a new or modified obligation, a different payment structure, or any other substantial change, it would be material to the overall understanding of the transaction and thus to the company's financial position and results of operations.