If you have bought a high end foundation from a beauty counter and been matched by the assistant then you can take your purchase back for an exchange or refund if you get home and find the match isn't as good as it looked in the shop. I have done this before with Clinique without any problem.
Another great tip for high end is to ask the assistant to match you and then let you have a sample to take home and try at your leisure. You are under no obligation to purchase. Again I have done this on many occasions with Clinique and Estee Lauder. Mac also do it but you must bring your own container. This is also a great pick-me-up if you fancy a makeup splurge but have no spare cash.
Thanks for stopping by and have a great weekend xx