And you know one that can do it? what's the risk buying such a cert ?
there is no risk as you meet with the doctor, the doctor takes a vaccine dose and instead of injecting it in your arm, it throws it into the trash or sink and marks it as injected in the system. The only risk is if the doctor says it to anyone, but in the end, there is no proof that the liquid went to the trash or sink instead of going into your body. Same as people having the vaccine, they don't have any proof saying that the vaccine dose went into their body instead of trash other than the person injecting it saying it did.
It's a trust system and any system based on trust can be manipulated.