Fat can be stored at appropriate temperature without damaging it. I suggest seeing an expert in fat transferring who uses the purest extraction and PRP. Best, Dr. Emer.
Fat injection is more popular now than ever in the past. Just to dispel some misconceptions you have, frozen fat will not survive, it does not work. Cool Sculpting does not work, none of the papers they show you are valid peer review articles showing scientific and analytic benefit. If it did we all could just go sit in a walk in freezer for a couple of hours a month. There are however different methods to process the fat. I use the Coleman centrifuge system. Many people use either a strainer or filter system and report excellent results also. When injecting into the face it should be fresh, and injected in small quantities (small cannulas) at a time for better survival. There is no special "license" for fat injection. Your best bet is to seek out a board certified plastic surgeon. The American Society for Aesthetic Plastic Surgery, surgery.org, is your best source for finding someone proficient in fat transfer to the face.
In order for the fat to survive the fat cells have to be intact and vialble or they will not survive.I only use fresh fat and do not freeze it.I just think it is better.On the face about 60 to 70% should survive.The less you do to the fat the greater the chances are that it will survive.