Giant Roam - serial number

[NotAnother Cyclist]

Trying to locate my serial number of my new bike. Not sure which number it us - there's a 5-digit number on the left of the frame near the rear hub, and a letter followed by a three-digit number on the right. Which is the serial number?

 

[mgs315]

If it’s like most bikes (my TCR is the same) it’s under the bottom bracket.

 

[vickster]

Should be on the receipt