PCR test for travel < 72 hours, do you get a physical letter or is an email sufficient?

[WeatherToday]

Travelling to Ireland next month and need to do a PCR test.
I'm assuming they just send an email and that is sufficient as a letter wouldn't arrive on time?
Getting paranoid so just checking.

Yes it's an email which you have the option to print out. Hope your travels go well.

thank you @coffeeisthebest