Can I set up multiple transactions and chose to fund only one of them?

Individual : You should only set up a transaction if you intend to transfer funds towards it. If you have set up multiple transfers for the exact same amount and send only one deposit, the funds would be linked to the first transaction that you have submitted.

Corporate : A Corporate can add up to 20 beneficiaries in one batch and can set up a max of 20 transactions at one go. Collated funds can be sent matching the exact total amount of transactions set up.