When should you require to be addressed by your title? I have been asked to sign a lengthly and detailed contract in order to teach a course as an adjunct at a local community college. The administrator requesting this information signed it with her title and her degree. The document was addressed to me as "Mr." ... I have both a Ph.D. and a thirty plus year career at a major university where I retired as a named research professor (facts clearly indicated on the vita in the administrator's possession!). Am I wrong to expect to be addressed as Dr. in such documents?
A lot of admin documents are produced by machine these days, the ones that aren't are usually done by clueless people who aren't paid an awful lot. It would be ideal that they addressed you as 'Dr.', but unless they deal with a lot of doctors they probably just shoved your name into the standard mail merge template. 

If you'd rather be addressed as 'Dr.' then raising the issue with them wouldn't be stepping out of line, after all you are the one providing them with a service.