American Express and PayPal have suspended operations in Russia and Belarus.
The moves over the past two days came after Visa and Mastercard took similar steps on Saturday.
"In light of Russia’s ongoing, unjustified attack on the people of Ukraine, American Express is suspending all operations in Russia," the Amex public relations office said Sunday in an emailed statement.
Early Monday, PayPal made a similar announcement.
"PayPal has been working closely with governments and partners to actively comply with all applicable laws and sanctions," President and CEO Dan Schulman said in a statement. "Under the current circumstances, we are suspending PayPal services in Russia."
PayPal will continue work to process customer withdrawals for a period of time, ensuring that account balances are dispersed in line with applicable laws and regulations, Schulman's statement said.
The moves are part of broader efforts by the private sector, either voluntarily or in response to government sanctions, to limit or halt business in Russia after its invasion of Ukraine.
Globally issued American Express cards will stop working at merchants or ATMs in Russia. The ban includes cards issued locally in Russia by Russian banks; those cards will no longer work outside of the country on the American Express global network. American Express is also terminating all business operations in Belarus, which has aided Russia in its attack.
"Over the past few weeks, we have been working hard to back our colleagues and customers in these countries. While this decision will have an impact on them, we will continue to do what we can to support them," Amex said in its statement.
American Express' partners in Russia include
Some impacts of the payment bans are already