While public libraries currently are not under Sarbanes-Oxley, the law provides guidance on minimum retention requirements that MHLS recommends libraries follow. The Sarbanes-Oxley Act addresses the destruction of business records and documents and turns intentional document destruction into a process that must be carefully monitored.
- The Sarbanes-Oxley Act and Implications for Nonprofits
- Sample Document Destruction Policy
Records Retention Schedule [National Council of Nonprofit Association]
| Type of Document | Minimum Requirement |
| Accounts Payable ledgers and schedules | 7 years |
| Audit Reports | Permanently |
| Bank Reconciliations | 2 years |
| Bank Statements | 3 years |
| Checks (for important payments and purchases) | Permanently |
| Correspondence (general) | 2 years |
| Correspondence (legal and important matters) | Permanently |
| Correspondence (with customers and vendors) | 2 years |
| Deeds, mortgages, and bills of sale | Permanently |
| Depreciation Schedules | Permanently |
| Duplicate Deposit Slips | 2 years |
| Employment applications | 3 years |
| Expense Analyses/ expense distribution schedules | 7 years |
| Year End financial statements | Permanently |
| Insurance Policies (expired) | 3 years |
| Insurance records, current accident reports, claims, policies, etc. | Permanently |
| Internal Audit reports | 3 years |
| Inventories of products, materials, and supplies | 7 years |
| Invoices (to customers, from vendors) | 7 years |
| Minute books, bylaws, and charter | Permanently |
| Patents and related papers | Permanently |
| Payroll records and summaries | 7 years |
| Personnel files (terminated employees) | 7 years |
| Retirement and pension records | Permanently |
| Tax returns and worksheets | Permanently |
| Timesheets | 7 years |
| Trademark registrations and copyrights | Permanently |
| Withholding tax statements | 7 years |