You cannot claim for costs in advance, only costs you have already incurred.
If you’re on a long-term placement you can claim part of the costs before the end of the placement if you prefer. This means, if you are on a 2 month placement you can submit a claim for costs from the first month once you have paid them. You can then submit another claim at the end of the placement for the second month.
If you choose to claim in this way, you must make sure you do not claim for overlapping dates.
Both you and your university must sign and date the form on or after the last date of the placement claim period.