One is to look at plastic negatives. The real card has a smooth surface, the color is not easy to fall off, and the negative has anti-counterfeiting marks; The surface of fake cards is rough, the color is easy to fall off, and the negatives generally have no anti-counterfeiting design. The second is to look at printing. Real cards have bright colors, clear characters and neat stripe inspection; The words on a fake card are vague, the color is too dark or too light, and the stripes on the card surface are irregular, just like sticking them on a white card. The third is to look at the signature column. The real card has the trademark of the copy issuing company; Fake cards have no company trademark, that is, they are all white or have altered marks, and their signatures are not smooth. Fourth, look at the neat and orderly capitalized English letters of the firefly Kaka number; The stamp number of the fake card is irregular or different from the size of English letters, and the altered old card number is faintly visible on the card surface.