A plastic card holder in combination with a radio frequency identification, RFID, tag, the card holder comprising: a first enclosed sleeve comprising a first slit, the first sleeve being configured to receive a first card via the first slit; a second enclosed sleeve comprising a second slit, the second sleeve being configured to receive a second card via the second slit; a lanyard or a connection mechanism to secure the card holder to clothing, characterised in that the card holder further comprises a third enclosed sleeve comprising a third slit (38, 88), the third sleeve being coupled at opposite ends (14, 24) to the first enclosed sleeve and the second enclosed sleeve, respectively, the third enclosed sleeve with its third slit being dimensioned and configured to receive the radio frequency identification, RFID, tag via the third slit (38, 88); wherein the slits form a lengthwise opening in one side of the enclosed sleeve, respectively: wherein in a closed position of the card holder, an end of the first enclosed sleeve and an end of the second enclosed sleeve are proximal one another such that the card holder is substantially triangular in shape; wherein the lanyard or connection mechanism is provided at the ends (16,26) of the first and second enclosed sleeves (12,22) for maintaining an orientation of the card holder with the ends of the first and second enclosed sleeves (12, 22) at a top and the third enclosed sleeve at a bottom of the substantially triangular shape when the card holder is being worn by a person by the lanyard or when being connected to the clothing by the connection mechanism; wherein the RFID tag is inside the third enclosed sleeve; wherein the third enclosed sleeve is sufficiently perpendicular relatively to one of the first and second enclosed sleeves (12, 22) to ensure that the RFID tag is maintained in a position such that its antenna is substantially perpendicular to said person's body when the card holder is being worn by said person by the lanyard or when being connected to the clothing by the connection mechanism for minimizing interference caused by water and moisture of the person on RFID communication between the RFID tag and a reader. a first enclosed sleeve comprising a first slit, the first sleeve being configured to receive a first card via the first slit; a second enclosed sleeve comprising a second slit, the second sleeve being configured to receive a second card via the second slit; a lanyard or a connection mechanism to secure the card holder to clothing, characterised in that the card holder further comprises a third enclosed sleeve comprising a third slit (38, 88), the third sleeve being coupled at opposite ends (14, 24) to the first enclosed sleeve and the second enclosed sleeve, respectively, the third enclosed sleeve with its third slit being dimensioned and configured to receive the radio frequency identification, RFID, tag via the third slit (38, 88); wherein the slits form a lengthwise opening in one side of the enclosed sleeve, respectively: wherein in a closed position of the card holder, an end of the first enclosed sleeve and an end of the second enclosed sleeve are proximal one another such that the card holder is substantially triangular in shape; wherein the lanyard or connection mechanism is provided at the ends (16,26) of the first and second enclosed sleeves (12,22) for maintaining an orientation of the card holder with the ends of the first and second enclosed sleeves (12, 22) at a top and the third enclosed sleeve at a bottom of the substantially triangular shape when the card holder is being worn by a person by the lanyard or when being connected to the clothing by the connection mechanism; wherein the RFID tag is inside the third enclosed sleeve; wherein the third enclosed sleeve is sufficiently perpendicular relatively to one of the first and second enclosed sleeves (12, 22) to ensure that the RFID tag is maintained in a position such that its antenna is substantially perpendicular to said person's body when the card holder is being worn by said person by the lanyard or when being connected to the clothing by the connection mechanism for minimizing interference caused by water and moisture of the person on RFID communication between the RFID tag and a reader. wherein in a closed position of the card holder, an end of the first enclosed sleeve and an end of the second enclosed sleeve are proximal one another such that the card holder is substantially triangular in shape; wherein the lanyard or connection mechanism is provided at the ends (16,26) of the first and second enclosed sleeves (12,22) for maintaining an orientation of the card holder with the ends of the first and second enclosed sleeves (12, 22) at a top and the third enclosed sleeve at a bottom of the substantially triangular shape when the card holder is being worn by a person by the lanyard or when being connected to the clothing by the connection mechanism; wherein the RFID tag is inside the third enclosed sleeve; wherein the third enclosed sleeve is sufficiently perpendicular relatively to one of the first and second enclosed sleeves (12, 22) to ensure that the RFID tag is maintained in a position such that its antenna is substantially perpendicular to said person's body when the card holder is being worn by said person by the lanyard or when being connected to the clothing by the connection mechanism for minimizing interference caused by water and moisture of the person on RFID communication between the RFID tag and a reader.