Citigroup Inc. is planning to test contactless-payment stickers in select cities this summer ... said a person familiar with Citi's plan, though the source did not know which cities. Citi is already ...

have signed a three-year agreement to develop contactless payment stickers which can be affixed to mobile phones or other devices. First Data will market the sticker as the GO-Tag, while INSIDE will ...

Now, Venmo will also suggest animated stickers, similar to GIFs, that you can put into your payment notes. A new video from Venmo shows that if you type "food baby" in the "Pay or Request" section ...