Method for tamper-proof sealing of packaged goods on a pallet, wherein the method comprises the following steps: a. Positioning a base film on a pallet, b. Positioning the packaged goods on the base film, which is situated on the pallet, c. Pulling up a film hood over the packaged goods, such that the base film and the film hood completely overlap and form an overlap area, d. Positioning the pallet in a welding system, e. Welding the films (3, 4) in the region of the overlap area of film hood and base film characterised in that the films are welded in step e at the level of the pallet, wherein a contoured weld seam is applied in the overlap region of film hood and base film, and the welding process according to step e. comprises the following steps: e. Heating up a heating stamp having a contoured stamp surface, f. Pressing the heating stamp against the films in the overlap region of film hood and base film at the level of the pallet for a welding time of 1-60 seconds, and welding the base film and film hood to one another, wherein a contoured weld seam emerges in the overlap region of the film hood and base film: wherein the pallet in step d. is positioned on a rotary table, and the welding according to step f. takes place in the following steps: f1. Rotating the pallet on the rotary table by 90°, f2. Welding the films (3, 4) onto both broad sides of the pallet, wherein one or more flat/straight heating stamps are pressed against the films across the entire width of the pallet, f3. Rotation of the pallet on the rotary table to by 90° back into the starting position, f4. Welding the films (3, 4) on both longitudinal sides of the pallet, wherein, on both sides of the pallet, one or more flat/straight heating stamps are pressed against the films across the entire length of the pallet, wherein the welding unit is preferably raised by the offset of the pallet boards, f5. Welding the films (3, 4) at the 4 corners of the pallet, wherein one or more round heating stamps are pressed against the films on the corner of the pallet. a. Positioning a base film on a pallet, b. Positioning the packaged goods on the base film, which is situated on the pallet, c. Pulling up a film hood over the packaged goods, such that the base film and the film hood completely overlap and form an overlap area, d. Positioning the pallet in a welding system, e. Welding the films (3, 4) in the region of the overlap area of film hood and base film e. Heating up a heating stamp having a contoured stamp surface, f. Pressing the heating stamp against the films in the overlap region of film hood and base film at the level of the pallet for a welding time of 1-60 seconds, and welding the base film and film hood to one another, wherein a contoured weld seam emerges in the overlap region of the film hood and base film: wherein the pallet in step d. is positioned on a rotary table, and the welding according to step f. takes place in the following steps: f1. Rotating the pallet on the rotary table by 90°, f2. Welding the films (3, 4) onto both broad sides of the pallet, wherein one or more flat/straight heating stamps are pressed against the films across the entire width of the pallet, f3. Rotation of the pallet on the rotary table to by 90° back into the starting position, f4. Welding the films (3, 4) on both longitudinal sides of the pallet, wherein, on both sides of the pallet, one or more flat/straight heating stamps are pressed against the films across the entire length of the pallet, wherein the welding unit is preferably raised by the offset of the pallet boards, f5. Welding the films (3, 4) at the 4 corners of the pallet, wherein one or more round heating stamps are pressed against the films on the corner of the pallet. f1. Rotating the pallet on the rotary table by 90°, f2. Welding the films (3, 4) onto both broad sides of the pallet, wherein one or more flat/straight heating stamps are pressed against the films across the entire width of the pallet, f3. Rotation of the pallet on the rotary table to by 90° back into the starting position, f4. Welding the films (3, 4) on both longitudinal sides of the pallet, wherein, on both sides of the pallet, one or more flat/straight heating stamps are pressed against the films across the entire length of the pallet, wherein the welding unit is preferably raised by the offset of the pallet boards, f5. Welding the films (3, 4) at the 4 corners of the pallet, wherein one or more round heating stamps are pressed against the films on the corner of the pallet.