Yes, you can pay for your friends. Each application must have a separate deposit of the full amount linked with it.
Please be aware that you are liable for any deposits you pay for your friend so if they cancel their campaigning place after the cancellation date, or do not show for their shifts onsite, you will not be refunded their deposit and so will need to secure the money from them.
Please note; fraud prevention systems mean you may not be able to pay two application deposits on the same card in close proximity. We recommend you wait for a short time between payments - if you do not the payment may fail and you will have to try again later on.