Thats the hardest part. I built something similar, although not anonymous (http://startupjob.me http://startupjob.me) and collecting is tough. What I have been

Thats the hardest part. I built something similar, although not anonymous (http://startupjob.me http://startupjob.me) and collecting is tough. What I have been trying is incentivizing the candidate to also check back in if they have been hired. That way you don't have to rely on the companies alone.