(and I have work in IT for nearly 30 years!)
"Please note that owing to demand, the print at home function is no longer available for future Arsenal purchases, and fans must select either postal delivery or collection at the Amex when completing their transaction. Supporters are strongly recommended to opt for postal delivery, as collection is expected to be busy on matchday."
http://www.seagulls.co.uk/news/article/brighton-hove-albion-arsenal-tickets-season-ticket-holders-2198182.aspx
"Please note that owing to demand, the print at home function is no longer available for future Arsenal purchases, and fans must select either postal delivery or collection at the Amex when completing their transaction. Supporters are strongly recommended to opt for postal delivery, as collection is expected to be busy on matchday."
http://www.seagulls.co.uk/news/article/brighton-hove-albion-arsenal-tickets-season-ticket-holders-2198182.aspx