Credit portability was created by the BC (Central Bank) to promote greater competition among banks to practice lower interest rates for the customer. Portability is what was known as buying debt (almost extinct). The purchase of debt was based on the customer going to the bank of origin, which he made the loan, and requesting a slip for another bank to pay off (pay) the debt and make a new loan, normally with the same amount of installment and a rate of lower interest. However, banks made life difficult for the customer and created numerous processes and bureaucracy in order not to lose the customer to the competition.

The BC (Central Bank) observing this abusive practice by banks, created a new method of buying debt, portability. Now, you no longer need to go to the bank where you made the loan to request the debit balance slip, just go to the new bank of your choice and enter your contract number and this new bank will create a portability request, that is, it will, through the Central Bank, request the outstanding balance of the client's loan from the bank he has a loan with and pay off this debt without needing a payment slip or even going to the bank. Everything is done through the computer and supervised by the Central Bank. Portability can only be done for an interest rate lower than the current one. So, BC (Central Bank) made customers always take advantage of portability.

Many companies, without bad intentions, say that by carrying out a portability, the new bank will release money for the customer. Portability does not release any value. It is just the transfer of debt from one bank to another with a lower interest rate. What happens then when the client has carried out the portability and received an amount on his account? This means that he carried out two credit operations, one for portability and the other for refinancing based on portability.