If a person has received social welfare assistance in one Member State during a period in which he was entitled to benefits under the legislation of another Member State, the body which provided the assistance may, if it is legally entitled to reclaim the benefits due to the person concerned, request the institution of any other Member State responsible for paying benefits in favour of the person concerned to deduct the amount of assistance paid from the amounts which that Member State pays to the person concerned.
This provision shall apply mutatis mutandis to any family member of a person concerned who has received assistance in the territory of a Member State during a period in which the insured person was entitled to benefits under the legislation of another Member State in respect of that family member.
The institution of a Member State which has paid an undue amount of assistance shall send a statement of the amount due to the institution of the other Member State, which shall then deduct the amount, subject to the conditions and limits laid down for this kind of offsetting procedure in accordance with the legislation it applies, and transfer the amount without delay to the institution that has paid the undue amount.