GitLab

Subtask of #632, partially blocked by #930 (closed).

One-sentence description

Export payment batches for ING for #632.

Motivation

Because we want Thalia Pay (#632).

Desired functionality

Export option for payment batches in the right format. These batches can be used to execute a direct debit batch.

Suggested implementation

• Need to determine the format with the treasurer.
• We can do this by adding extra payment actions to the payments admin that only exports payments marked for direct-debit (#930 (closed)).
• The selection for which time the payments are exported can already be selected using Django's built-in date filter.
• The mandate 'last used' field should be updated upon export of the payments.