An apparatus for inserting one or more goods (G 1, G 2) into a moving envelope (E 1, E 2), comprising: an envelope transport; and at least one separating device configured to open the envelope (E 1, E 2) so that a first part and a second part of the envelope (E 1, E 2) are separated from each other, and engage with the first part of the envelope (E 1, E 2) and maintain the first part of the envelope (E 1, E 2) separate from the second part of the envelope (E 1, E 2) during at least a part of the movement of the envelope (E 1, E 2). characterized in that for opening the envelope (E 1, E 2), the separating device is configured to be arranged initially at a first position below an envelope transport level, and to be moved subsequently to a second position above the envelope transport level, wherein at the first position the separating device is in contact with the second part of the envelope (E 1, E 2), and wherein at the second position the separating device is in contact with the first part of the envelope (E 1, E 2), the separating device comprises a first roller, a second roller and a belt or a chain extending around the rollers (404, 406) to which one or more separating claws are mounted, and a separating claw comprises a main body and a tip extending by a distance from the main body so that upon rotating about the roller, the tip is below the transport level of the envelope thereby pressing the envelope downwards for easier opening of the envelope. an envelope transport; and at least one separating device configured to open the envelope (E 1, E 2) so that a first part and a second part of the envelope (E 1, E 2) are separated from each other, and engage with the first part of the envelope (E 1, E 2) and maintain the first part of the envelope (E 1, E 2) separate from the second part of the envelope (E 1, E 2) during at least a part of the movement of the envelope (E 1, E 2). open the envelope (E 1, E 2) so that a first part and a second part of the envelope (E 1, E 2) are separated from each other, and engage with the first part of the envelope (E 1, E 2) and maintain the first part of the envelope (E 1, E 2) separate from the second part of the envelope (E 1, E 2) during at least a part of the movement of the envelope (E 1, E 2). characterized in that for opening the envelope (E 1, E 2), the separating device is configured to be arranged initially at a first position below an envelope transport level, and to be moved subsequently to a second position above the envelope transport level, wherein at the first position the separating device is in contact with the second part of the envelope (E 1, E 2), and wherein at the second position the separating device is in contact with the first part of the envelope (E 1, E 2), the separating device comprises a first roller, a second roller and a belt or a chain extending around the rollers (404, 406) to which one or more separating claws are mounted, and a separating claw comprises a main body and a tip extending by a distance from the main body so that upon rotating about the roller, the tip is below the transport level of the envelope thereby pressing the envelope downwards for easier opening of the envelope.