The files need to be separate i.e the data in Excel the documents in Word or Publisher (Word will provide more functionalty - Publisher makes the production of stylish documents simpler). The documents can be connected seamlessly to the data.

If you can reproduce the certificate design in Word I would do so. You can then either use a VBA userform to read the data into a combo box or list box and select the record(s) to be processed, or use mail merge, but as Paul says, they will be separate documents.

See http://www.gmayor.com/Userform.htm and for a more in depth explanation, see http://gregmaxey.com/Create_and_employ_a_UserForm.htm

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com