The invention relates to a method for producing reclosable packages and to a deep-drawing packaging machine with an embossing station for embossing recesses into a top foil. wherein the pre size of a majority thereof is =1000 \u03bcm, preferably 10-500 \u03bcm. Then the plurality of the first and second register lines in the respective registration frame are detected with a register sensor, and an output signal of the register sensor relating to the respective second register line is compared with an intensity threshold value in order to determine whether the second register lines can be recognized.