Hello and thank you for your question. First off, no this is absolutely not normal. There are identification stickers that come along with the breast implant identification card. You should have been provided with a card and different ID for each breast implant. These cards will provide you with the manufacturer, reference number, and serial number for each implant. These are important to retain for your records as you will need this information at a later time. Please note that most breast implants come with some form of warranty as well. You have the option of purchasing an extended warranty, however, the information needed to be submitted to the manufacturer following your surgery. You should have had some communication from them letting you know that your implants have been registered. Should at anytime there be a recall or defect in the device, this allows they have the correct information to contact you. My suggestion would be at the least to obtain copies of the ID cards for each implant and contact the manufacturer accordingly to ensure that the implants have been registered. I hope this information helps you and good luck.Fadi Chahin MD, FACSPlastic and Reconstructive SurgeryDiplomat-American Board of SurgeryDiplomat-American Board of Plastic Surgery