I tried to see if someone has asked this question before with no luck.  Once on board we will receive $1050 OBC from our travel agent.  We would like to pre-pay for gratuities  and Silver Spirts, $1400 total before we go.  My question is will Viking apply the $1050 to the already paid balance and refund or money once we are on board? We would pay with an echeck thus saving the service charge for credit card.  Thanks