First off, some words from MD law § 8-203 (h) (1) If any portion of the security deposit is withheld, the landlord shall present by first-class mail directed to the last known address of the tenant, within 30 days after the termination of the tenancy, a written list of the damages claimed under subsection (g)(1) together with a statement of the cost actually incurred.
Your landlord was under no obligation to give you the receipts for the work. This was an extra.
You may want to post on one of the other law boards, but if you send a letter to the landlord disputing the charges and explaining that you are cashing the check only as a partial settlement, then you (in most states - check with a lawyer in your state to be perfectly certain) can take the money now available and proceed later as you choose.
In MD, you have the right, by written request, to be present when the apartment is inspected. What did you guys say when you were at the walk through?
You do not need to accept the handwritten receipts or any other of the charges shown by the landlord. But, just like the landlord must use the court system to formally require a tenant live elsewhere, you must use the court system to cause a change in the deposit deductions.
In court, since you are the plaintiff, you will have the burden of meeting the threshold of proof. If all you present is a statement of “It shouldn’t have cost that much!” you’ll lose. The landlord doesn’t really have to do anything, since he is the defendant. The court will, usually, accept the written receipts as reasonable evidence of what things cost. You will have a stronger argument on the repairs that were not raised during the walk through. If you foolishly skipped your legal chance to previously discuss potential problems, the judge will not be impressed. On most repair charges, simply showing that you have the ability to find a place that would have done things cheaper, is not enough to sway the judge unless the difference is more than 50%. If the landlord, using whatever resources available, made the repairs, the judge will be very loath to second guess the reasonableness of the charge unless it is obscenely inflated.
Separately, if you say the keys were returned and the landlord is still showing a charge, why not ask him how come? The most common problem I incur is that the original keys are not returned, but rather some copies of the keys or only a portion of all copies originally given. This forces me to pay to re-key all locks, which can be expensive. (If all original keys are returned, I will install different locks as my normal recycle costs.) If this doesn’t fit your situation, the landlord may have only made a simple mistake which can be rectified by your courteous conversation. Your messages previously left were “bend over backwards” courteous, weren’t they?
Good luck.
Gene