1, number. The serial number of sp cards in the lower right corner of all genuine mobile Altman series cards is sc, and sp cards are issued in the two-yuan luxury series. Only one SP card for two people is issued for the second anniversary gift package, and there are two kinds of SP cards.

2. printing. The back of the fake card is illegible. When you get the card, put it in front of your nose and smell it. Fake cards will have a pungent smell of ink, which is difficult to remove.