What is the amount upper limit on a single PayPal transaction?
As of 2013 - in European Union EUR 8'000, in United States USD 10'000, in other countries in the same range, clarify exact amount with local PayPal.
There may be though other limits on the buyer's side, for instance there is an additional limit for not verified PayPal account in EU, or credit card / bank account limits. Check with local PayPal and/or corresponding financial institution.
Is there a limit on a number of PayPal transactions?
There is no limit.
Is there a limit on the total receipts via PayPal?
After a certain amount of annual receipts via PayPal (EUR 2500 in EU as of 2013), one-time extended account verification may be required by PayPal. Please get in contact with local PayPal for details.
What browsers are supported by NetLicensing Console?
All popular modern browsers (Chrome, Safari, FireFox, IE/Edge, Opera) are supported, however we only consider latest releases as recommended by the browser vendor. The only known incompatible browser is the Internet Explorer 11 on Windows 8.1, if you hit the problem with IE11 (page is not responding) we recommend to use Microsoft Edge instead.
Payment cannot be processed due to the PayPal currency conversion handling error
If merchant and buyer have different (main) currencies in their PayPal accounts and merchant restricts currency conversion – PayPal is showing following error message:
“We aren't able to process your payment using your PayPal account at this time. Please go back to the merchant and try using a different payment method."
In order to resolve this issue, following steps recommended on vendor (PayPal merchant Business account) side:
Go to “Block payments (Business) -> Payment receiving preferences” and select „Yes, accept and convert them to U.S. Dollars.”
See also the screenshots below for your reference (click to enlarge):