Yes, I know. I just send very fresh seeds (1 day old), and I treat them as well as I can to keep them alive. I sent to Greece, they arrived in 3 weeks and sprouting in the envelop💛
I clean the recalcitrant seeds well and soak them in Hydrogen Peroxide for 30 minutes. I pack them in plastic bag with holes in them for breathing and some moist Hydrogen Peroxide soaked coconut husk to keep them from drying out.
The seeds lives very short