The law in plain English
Return deadline
Under Or. Rev. Stat. Section 90.300, the deposit response usually has to be sent within 31 days of the move-out timeline described by the state rule.
Required notice
Oregon generally does not impose a statewide deposit cap, but the landlord usually has 31 days to send the refund or an itemized statement, and late or bad-faith withholding can support up to double damages.
This dispute type
Once the Oregon deadline passes, the dispute stops being only about the deductions and becomes a deadline-compliance problem too. A landlord may still argue damage existed, but Or. Rev. Stat. § 90.300 sets the clock for returning the balance and explaining any amount withheld.
Penalty leverage
If the withholding was wrongful or in bad faith, the exposure allowed under the statute is: You can recover up to twice the amount wrongfully withheld (failure to return on time can constitute bad faith)