Quite sure the first word on all three lines is "erhalten" (meaning "received" or, much less likely, "preserved"), and the second word on each line looks like a (possibly abbreviated) signature of the person who received the thing or sum that "erhalten" refers to.
The signature on the second line looks like "Roth" or maybe "Rath", which could be either the full name or an abbreviation ("Namenskürzel") for a longer name like "Rothenburger" or the like.
The signature on the third line looks a lot like a slightly less readable version from the same "Roth" person.
The first line looks like it's a different Namenskürzel, possibly starting with a B, but mostly undecipherable, and I would be surprised if this was a full last name.
It's entirely possible that all three lines are from the same person. The handwriting in itself looks quite similar for all three lines, although the "er" part of "erhalten" is written a bit differently in the first line.
"Namenskürzel" or name initials are often used in internal documents or repeating business processes instead of a full signature.
I can't exclude "Rolf" for the second and third line, and if you get that from context, I can see it. FWIW, what brought me to say "Roth" was a) that an "f" would normally have a descender in both German and Latin cursive, b) the last letter doesn't look like f to me in the second image, it does more look like it in the third one. C), using a first name here would seem unusual to me, but probably possible in a family shop.