Do postal PCRs have a shelf life?

[ChristingleJingle]

Due to a ballsup on ordering (website issue not mine!) I got sent 2 x postal PCRs a few weeks ago. Less than a month.

I used one at the time but have a 'spare' and am feeling unwell - can I use it still? Thanks

Does it not have a date printed on it?

There's a date on the grey bag. Am in similar situation. My spare one says it's good til June next year

You just have to phone them to register it or order another one and use the code. But that way you'll end up with another spare