What it means
The receiving bank thinks that this EFT is a duplicate of another EFT and they have returned the money. This return code is rare.
How to fix it
For tenant payments, Association owner payments, and rental application fees
This return code should not apply to incoming payments.
For rental owner and vendor payments
Contact the rental owner or vendor to find out how they'd like to proceed. The rental owner or vendor should talk to their bank before you resubmit the payment.
Buildium strongly suggests you get epayment information from a voided check. If a voided check is unavailable, get a letter from the bank or another "official" document.
R24 Duplicate Entry
The RDFI has received what appears to be a duplicate entry; i.e., the trace number, date, dollar amount and/or other data matches another transaction. This code should be used with extreme care. The RDFI should be aware that if a file has been duplicated, the Originator may have already generated a reversal transaction to handle the situation.