Loans can change account numbers after restructuring, portfolio sale or servicing migration. Before disputing, ask the lender whether both tradelines represent different stages of the same facility and how each should be reported.
Look for impossible double balances
If both entries show the full current balance and both are marked open, your total debt may appear doubled. If one is closed with zero balance and the other continues, the history may be legitimate. The status and balance combination matters.
Check payment history alignment
Duplicate accounts often repeat identical DPD patterns. Take screenshots of matching months, amounts and opening dates. This makes the dispute easier to understand.
Ask the lender to correct the source file
A bureau may temporarily suppress an entry, but durable correction usually requires accurate data from the reporting institution. Request written confirmation of the valid account number and the action sent to each bureau.
Monitor every bureau separately
A correction can reach one bureau before another. Keep a checklist and close the case only when the affected reports are correct.
If the duplicate causes a loan rejection
Give the new lender the dispute acknowledgement and evidence if timing is urgent, but understand that the lender may wait for bureau correction. Avoid multiple new applications while the false debt is still visible.
Decision rule
Prove duplication through matching account facts, get the reporting lender to correct the source and verify all bureaus. A precise data dispute is far more effective than asking someone to “increase my CIBIL score”.