Most credit cards are personalised using the embossing method. In the past, when credit card transactions were generally approved by making a physical impression of the numbers via carbon packets and a “zip zap” machine, embossing was necessary, but today it is simply a manufacturing habit.

Embossing enhances the overall impression of the card, creating a sense of quality and value. When cards are embossed they receive a three-dimensional effect, and the raised letters and numbers can be coated with a variety of coloured inks such as gold, silver, black or white. Cards can only be embossed on one side, and the data are easily readable by the human eye.