It is completely possible to make a donation in the amount of your choosing by making a direct deposit to Caritas International. Here is the necessary information:
Caritas International asbl – Rue de la Charité 43, 1210 Bruxelles.
IBAN : BE88 0000 0000 4141 – BIC : BPOTBEB1
You can also download a pre-completed wire transfer form to submit to your bank.