Colorado’s security deposit statute does not require a landlord to send receipts along with its itemized list of deductions. If you feel the charges are not legitimate, you may challenge them in court. Depending upon the court in which the case is filed, you may be entitled to see the landlord’s evidence prior to trial. The statute also says that no security deposit may be retained to cover normal wear and tear, and suggests that any lease provision to the contrary may be unenforceable. This issue is somewhat complicated, so you may want to consult with an attorney before deciding a course of action.