Confirmation of commercial experience: experience according to employment record or GPH?

Confirmation of professional experience can be provided either through an employment record book (official employment with a record in the employment book) or through a civil law contract (GPC). It is important that the documents clearly indicate that you performed professional tasks corresponding to the claimed experience. For senior-level positions, it is preferable to have confirmation through an employment record book, as this indicates stable and official employment, but GPC is also accepted if there are supporting documents (acts of completed work, contracts, recommendations).