note or notes

[thomas615]

If there are some scribbling on a piece of paper, does one describe the page as "handwritten note" or "handwritten notes"

[billmcd]

If there are some scribbling on a piece of paper, does one describe the page as "handwritten note" or "handwritten notes"

It depends on the content. A "handwritten note" would / could be a meaningful sentence(s), whereas "notes" would suggest single words or phrases that perhaps only the author would understand. But your term "scribbling" suggests to me the latter, i.e. "notes".

[5jj]

If there are some scribbling X

If there is some scribbling/If there are some scribbles.