My question involves landlord-tenant law in the State of: Delaware
We were in a month to month tenancy. The original lease had expired and just became month to month (for over a year). We bought a home and gave our Landlord 6 weeks notice. He seemed fine with our notice. Our rent was on an automatic payment, so April was paid in full. We moved out on April 14th, a day earlier than we had said, but of course expected him to keep 1/2 the rent for the month. He kept the entire month (no explanation). Since moving, we have learned that Delaware has a 60 Day notice law, that we were unaware of. We aren't sure if we should just let it go?
Also, DE law says that the security deposit must be returned within 20 days, and a list of issues and receipts must accompany any deposit not returned. He returned 1/2 of our deposit, 25 days later, with no explanation of why he kept 1/2. I know not to deposit the check if we plan to dispute it, but I am really not sure what to say in the letter. At this point, can he come after us for the additional 30 days we didn't give notice? Shouldn't we be entitled to at the very least an explanation of why he kept 1/2?
Thank you for any help you can offer.

