If you are asking- Most probably if the cards are MRCC and Amex gold charge.
If you are telling - little more details like the type of card and how a single person can get three cards eligible for gold collection would really help. 🙂
I have 3 Amex cards, Plat Reserve, Gold Charge and MRCC. These are under one ID and all points earned are shown together and can also be redeemed together, even for 18k and 24k rewards or otherwise.
No. Not all cards are eligible for gold collection. I clarified this with the customer care and they mentioned that platinum travel card is not eligible for gold collection.
That's how I have it - MRCC as a LTF companion with paid Gold Charge. However, every year on renewal, I call up and request fee waiver on Gold Charge and the fee gets waived, so essentially both cards become free. Was reading in one of the threads that currently they are not offering MRCC LTF as companion with Gold Charge, don't know if they have started it again. But earlier it was pretty common to offer MRCC as companion to Gold Charge.