Relevant documents can be attached to invoices

Step 1. Select Debtors / Creditors > Invoices and select the invoice you wish to add the document to

Step 2. Select Documents

Step 3. Select Add and find the file which you wish to attach to the invoice

Note: When Linking this invoice to a transaction in Cashbook, this transaction will not carry across however can be uploaded again manually via the same method when adding the transaction.