The evaluation of the accuracy of measuring equipment is critical for detailed recordings of cultural heritage. Recently developed technologies like terrestrial laser scanners (TLS) are lacking a comprehensive knowledge base when compared to traditional surveying instruments. The main reason is limited knowledge of errors that affect these systems, due to the proprietary design of the scanners, their software and the integration of many potential sources of error. Many tests and recalibrations are undertaken to certify these instruments’ accuracy under scientific laboratory conditions. Therefore, this study aims to evaluate the accuracy of the automatic targetless registration option of FARO M70 laser scanner and its use in 3D digitized recordings of cultural heritage, under real-case scenario conditions. The evaluation takes place in the post-byzantine church of Archangels Michael and Gabriel in Voskopoja, Albania. The data acquired in the field from laser scanning, the 300-years old Monument, are processed and registered with FARO SCENE software following the automatic targetless registration option and ‘Top View and Cloud-to-Cloud’ method, three consecutive times. The three results of the Registration Report—automatically generated using the proprietary design of the FARO SCENE software—are compared with each other and the direct measurements taken on-site using laser distance metre and an 8 m measuring tape. The level of accuracy is high but depends progressively on the number of scans and the integration of indoor and outdoor scans. The level of precision, on the other hand from measurements taken inside the 3D digitized point cloud, is moderate and dependent on the discretion of the user who interprets the data.