This means the PayPal site will be unavailable and you will not be able to process any payments for approximately two hours.

You do not need to do anything during this upgrade. A message will appear on the PayPal site to inform customers that the site is temporarily unavailable.

Once it is complete, you will be able to conduct business as usual.

PayPal apologises for any inconvenience this may cause and thanks you for your cooperation.

Sincerely,
PayPal Operations Team