Neighbors male cat keeps peeing on our house!?

We have already talked to the neighbors about getting him neutered but they said it wasent theirs... although they were lying because we see the cat inside their window all the time. We have 2 indoor female cats, but this male cat keeps peeing all over the outside of our home and it's frustrating and... show more We have already talked to the neighbors about getting him neutered but they said it wasent theirs... although they were lying because we see the cat inside their window all the time. We have 2 indoor female cats, but this male cat keeps peeing all over the outside of our home and it's frustrating and disgusting. We told them that we're going to trap him if they don't do anything, which they replied that they were going to have him fixed, which they never proceeded with. We called animal control, and the humane society and there is a $100 fee for giving them this cat. Which we don't think we need to pay for, so we were just thinking of letting it go at a park somewhere. What should we do? Is there any other options, we've tried sprays for the outdoors, and it did not work. Any suggestions? Thanks!
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