Hi NMackin,
When sending invoices or statements, you can easily update the recipient's email address. In the email field, simply delete the existing email address and type in the new one you'd like to use. Once you've entered the desired email address, you can proceed to send the document as usual.

After doing so, you may see a message that says, 'The email address is different from that stored in the card file. Would you like to update the card file?' Just click No to proceed without updating the card file.

Regards,
Sai