Need to add Voucher no to the AP Invoice Notification Title

Summary:

Need to add Voucher no to the AP Invoice Notification Title

Content (required):

We have a requirement to add AP Invoice voucher no to the AP Invoice notification title.

We have already added Invoice no, Supplier name, Invoice amount and Currency to the title.

Can we add the AP Invoice voucher number also as an argument in the Title. What's the field name for the voucher no.

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