mkdir -p senders
printf 'address=%s iban=%s bic=%s\n' \
$(POST address |STRING) $(POST iban |STRING) \
$(POST bic |STRING) >"senders/$id"
mkdir -p senders
printf 'address=%s iban=%s bic=%s\n' \
$(POST address |STRING) $(POST iban |STRING) \
$(POST bic |STRING) >"senders/$id"