You're a cash basis taxpayer. It does not matter if the charitable organization cashed your check in 2022 or 2023. What matters is the date you sent the check to them, which is based on the check date shown on the actual check. The discrepancy between the receipt from the organization and your return is easily identifiable and explainable. You'll just have to remember to remove the deduction from the statement they send you in 2024.
