If a client wants a sample of medication ,you need to print off a orderform,put the orderform inside a plain looking letter,and put about one dollar worth of postage on the letter ,write air mail on the letter,put biotrans address on the letter put a return address on the letter and if it arrives here in england,biotran will send a sample to you.There is no need to send any payment with this form,If you like the sample of medication ,you will need send some sort of payment for the next shipment,the cost is 5 dollars or 10 which will depend on the medication.