Please bring the manuals for both your vehicle and car seat(s). If you do not have either of these, please let me know beforehand, so that I can try source them prior to our appointment.
It is helpful to send a photograph of the sticker on your car seat prior to our appointment. It is usually on the back of the seat, possibly on the inside side, or even under the seat cover.
If possible, bring your child, and have their current height and weight information on hand. I know this is not always possible or easy – so if your child will not be attending the appointment, it is helpful to have a photo of them sitting in the seat, clearly showing the harness fit from the front (i.e. face and shoulders forward, facing the camera)