Companies that provide company or pool vehicles are legally obligated to regularly check whether their employees possess a valid driver license (§ 21 StVG). The employer is considered the vehicle owner and is liable to prosecution if they allow driving without a valid license. A one-time check is insufficient; recurring checks are required. GreenGate offers a standard solution for this with GS-Works. The mobile app is part of the GS-Service software suite and enables the planning, execution, and audit-proof documentation of drivers license checks on mobile devices. The so-called blueprints are tried-and-tested best-practice concepts that must be individually adapted to customer systems. Drivers license checks serve as legal protection and risk management for the vehicle fleet. They are mandatory for company and pool vehicles, but not for purely private cars. No legally prescribed check interval is specified; in practice, checks every six months have proven effective, ideally before every trip for pool vehicles. Documentation must comply with data protection regulations (BDSG and GDPR). During the check, only the original drivers license may be examined. The employer or an authorized person must verify its authenticity and validity using security features such as watermarks, edges, lettering, and tactile textures. Furthermore, the validity in Germany, the correct driver's license category, any conversions, and official restrictions (e.g., automatic transmission restrictions) must be checked. Every check must be documented in writing, including the date and the drivers signature. These records should be kept for at least five years. Standardized forms or digital solutions such as GS-Works facilitate legally compliant implementation.