If someone is using Microsoft Word, he or she can download customizable certificate templates from the Microsoft website. Although the templates may read "Certificate of Achievement" or something similar, they are easily altered to reflect a baptism. The text, pattern and information provided can all be edited to suit the event.
Some religious websites offer free downloads for church-affiliated certificates. The My Church Toolbox organization allows users to download a variety of different templates free of charge.
Another option is to download a certificate template from an online Web design website. The cost for these certificates varies based on the exact design, but the text usually does not need to be altered to reflect the event.