Online payment outfit PayPal has apologised for problems users have experienced in accessing the service following a routine upgrade last Friday.
A statement on the PayPal site reads: "A technical problem has caused intermittent availability for members attempting to use the site. Activities such as accessing account information, paying for ended eBay listings, and using PayPal shipping functionality have been intermittently available."
The company, a subsidary of online auction house Ebay, says it is "working furiously" to resolve the problem and restore normal service for its users. PayPal debit cards are also affected by the outage, the company confirmed.
EBay and PayPal users have in the past taken both companies to court over service-related issues. EBay was recently sued over billing glitches, while PayPal paid out $9.25 million in July in settlement of a class action lawsuit over allegations of poor customer service and the closure of accounts without notice.