A credit history is a timetable of all your credit transaction over a period of time.  In that period, every transaction you have ever made is duly reported and thus constitute your history.  Circumstances sometimes dictate that some items on your credit report may carry a negative balance, meaning that item is considered as a debt and you are therefore required to repay that debit, unless you can prove that the item has badly and inaccurately reported.  The process of going through once credit history and challenging badly reported items is part of credit repair history.
With our credit repair toolkit, it is possible to improve one's credit score,