Method for near-field communication between a mobile device and a contactless card comprising a biometric sensor, comprising the following steps: a) displaying, on a screen of the mobile device, a first positioning pattern, positioning the contactless card in a first position, close to the mobile device, where a card indicator (18, 19) provided on one side of the contactless card is aligned with the displayed first positioning pattern, and establishing near-field communication between the mobile device and the contactless card in the first position, and b) displaying, on the screen of the mobile device, a second positioning pattern, positioning the contactless card in a second position, close to the mobile device, where the card indicator is aligned with the displayed second positioning pattern, and establishing near-field communication between the mobile device and the contactless card in the second position, in which method the first positioning pattern and the second positioning pattern are visually complementary to the card indicator (18, 19) and, in the first position and the second position, the card indicator visually complements the first positioning pattern and the second positioning pattern, respectively, so as to form a predefined pattern and the biometric sensor is in a card area which extends beyond the mobile device in the first position and second position, respectively. a) displaying, on a screen of the mobile device, a first positioning pattern, positioning the contactless card in a first position, close to the mobile device, where a card indicator (18, 19) provided on one side of the contactless card is aligned with the displayed first positioning pattern, and establishing near-field communication between the mobile device and the contactless card in the first position, and positioning the contactless card in a first position, close to the mobile device, where a card indicator (18, 19) provided on one side of the contactless card is aligned with the displayed first positioning pattern, and establishing near-field communication between the mobile device and the contactless card in the first position, and b) displaying, on the screen of the mobile device, a second positioning pattern, positioning the contactless card in a second position, close to the mobile device, where the card indicator is aligned with the displayed second positioning pattern, and establishing near-field communication between the mobile device and the contactless card in the second position, in which method the first positioning pattern and the second positioning pattern are visually complementary to the card indicator (18, 19) and, in the first position and the second position, the card indicator visually complements the first positioning pattern and the second positioning pattern, respectively, so as to form a predefined pattern and the biometric sensor is in a card area which extends beyond the mobile device in the first position and second position, respectively. positioning the contactless card in a second position, close to the mobile device, where the card indicator is aligned with the displayed second positioning pattern, and establishing near-field communication between the mobile device and the contactless card in the second position, in which method the first positioning pattern and the second positioning pattern are visually complementary to the card indicator (18, 19) and, in the first position and the second position, the card indicator visually complements the first positioning pattern and the second positioning pattern, respectively, so as to form a predefined pattern and the biometric sensor is in a card area which extends beyond the mobile device in the first position and second position, respectively.