In which official document must it be checked whether a moped is approved to carry a passenger?

Question

DentroTest · Accepted Answer

To find out whether a moped is approved to travel with two people (driver and passenger), the vehicle's registration certificate must be consulted (or, failing that, the technical inspection card of the roadworthiness test (ITV)). That document expressly states the number of authorized seats (code S.1). If it indicates only one seat, a passenger must not be carried under any circumstances. The driving license only proves the driver's personal entitlement, while the purchase invoice is proof of a commercial purchase with no technical or regulatory validity before the traffic authorities.

In which official document must it be checked whether a moped is approved to carry a passenger?

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