A SDD can be updated until it’s collected in a collection. The creditor can modify:
The amount,
The remittance information,
The endToendId,
The initiator transaction reference
The due date,
The creditor account.
The software checks that:
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The SDD is under an editable status,
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the due date is still valid according to the cut off delay (calculated according to the sequence type and the creditor bank account),
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if different from the original one, the endToendId is not a duplicate,
If the creditor requested it, the modification can be waiting for validation
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The SDD is not obsolete for more than 3 months.