U16 Villa Ticket

Sorry if this has been asked before.
I received my grandson’s tickets and mine and noticed that his ticket has a section missing. The value on the tickets both are at £10 but obviously his was charged at £5. Is the missing section on his ticket to denote at the gate that he is an U16?
I would hate to get up there and be asked where is the missing section and have problems with him gaining entry to the ground.

Adult tickets should have 2 stubs and juniors 1.

All stubs will be torn off at the gate.