Is it against the law for a debt collector to call you on Sunday in Kansas?
Yes. A debt collector is allowed to call you between 8 am and 9 pm (your) local time. They are not allowed to call you during times they know to be "inconvenient." If you tell them that Sundays are not a convenient time to call, they are supposed to respect that. All of the guidelines can be found n the Fair Debt Collection Practices Act.