JOSO

I have a number of instances where the source is my own knowledge / experience.

The common expression if we were talking face to face is, "I was there" or, "I am certain this fact is true".

This usually comes as a result of the 100/80 year embargo on accessing source documents.
Example: I was a witness at my cousin's wedding but do not have access to the wedding record. As a result I know the date / times & locations & participants.

In effect the source is a declaration.

I am competent to create a source from scratch by copying and editing a source fields and editing the sentence, but I am struggling with what keywords to use.

Can I get some suggestions on how to express myself, whether I should use a repository or qualify myself so that a reader does not need to contact me to verify what I have said is correct.

A screenshot of a template or a copy of an unedited sentence would be most helpful.

Thank you, John