Customs declaration form

[leesider]

Hi,
I am returning an item to Screwfix.ie and they sent me a customs declaration form to fill out. I have attached an image of it.
I don't know if I am supposed to sign the left side of the form; Screwfix told me to ask the Post office; I did but they didn't know.
Any replies will be appreciated.

 

[Ravima]

you sign where the red x is

 

[leesider]

OK thanks. I actually returned the items in person to the store anyway