As legal documents, collected records should be kept for a fixed period of time according to laws and industry regulations. Generally speaking, collection records should be kept for at least five years. This is because in most countries, including China, financial institutions and loan companies are required by law to keep repayment records of borrowers for at least five years.

In loan disputes, collection records are one of the important evidences. If a financial institution or loan company cannot provide a complete recording of the collection, it may affect the outcome of its legal proceedings. Therefore, in order to protect their own rights and interests, these institutions usually take measures to ensure that the retention period of the collection recording is consistent with the repayment record.

In addition, the retention period of collected records may also be affected by specific industry regulations. For example, in China, according to the Regulations on the Administration of Credit Information Industry, the retention period of personal bad information by credit information agencies is five years. This means that if personal bad information is involved in the collection records, it should be kept for at least five years.

It should be noted that different countries and regions may have different legal provisions. Therefore, in specific cases, it is best to consult local legal professionals or relevant institutions to obtain accurate legal advice.

In addition to the statutory retention period, the preservation of sound recordings should also pay attention to confidentiality and safety. Because these recordings may contain sensitive information, such as personal privacy or business secrets. Therefore, financial institutions and loan companies must take appropriate measures to ensure that these information will not be accessed or leaked by unauthorized third parties.

In a word, the storage period of the collected recordings should comply with the laws and industry regulations, and attention should be paid to confidentiality and safety.