Dispute Experian
To dispute Experian credit bureau a dispute letter must be sent. When the bureau receives your letter they will investigate the dispute.
The first step though is to get a copy of your credit report. You can get a free credit report once a year from each credit bureau. I suggest you go to annual credit report, they will provide you with your free copy.
Often your credit report will be made available online; you need to then decide what items are inaccurate or incorrect. These are going to be the items you dispute.
These marks are disputed by writing a dispute letter and sending it to Experian. Upon receipt they will say if your dispute is valid or invalid.
If your dispute is considered invalid you will get a letter from them requesting additional information about the dispute. You need to respond and provide them with the information requested.
However if your dispute is found valid they will conduct an investigation. During an investigation they will contact the creator of the listing and ask them to verify the account, the dates, and the amounts.
It has been found that investigations will often result in a listing being removed. This is a result of many businesses being unwilling to spend the resources verifying disputed debts.
Your other option to dispute bad credit is to hire a credit repair service. If you do hire a service all you will need to do is identify what items you wish to dispute.
In case an item is verified then a credit repair service can be very helpful because they have advanced dispute techniques. These include; creditor direct intervention, escalated dispute information requests, and debt validation.
If you only have minor damage on your report then I suggest repairing your credit yourself. However if you have multiple negative marks on your report I suggest a service. They can also help getting a valid dispute submitted to the bureaus.
Be aware that you must send a dispute letter to each credit bureau. If you do not you may remove a negative mark from your Experian credit report however this mark will still be on your Equifax and Transunion credit report.
In sum negative items can be removed from your credit report. You do not have to live with the high cost of low credit.