Usually with home test kits they have a prepaid label for return but I always prefer to send next day Special Delivery.
No issues until this week when I sent two blood tests and both took 3 days to get there and Lab has informed me that both samples are unusable; thankfully on this occasion they are sending me a freeby kit, but because I restarted certain supplements there is now going to be a delay in me being able to redo the test.
I phoned RM to complain and mention how much money they had cost me, and had this dingbat female tell me special delivery next day wasn't guaranteed and there were current delays with that service, so I kindly reminded her that the word "guaranteed" was plastered all over their website with nothing currently detailed against that service saying there were delays. "I am very sorry but all you can do it put in a claim"
RM are clearly not to be trusted so I am going to have to find a next day courier service for future, so please be aware so you don't get caught out