In Switzerland, it is by law allowed to check the address behind someone’s car number plate. Each canton (=province) has developed its own system for this. Most of the cantons allow a direct lookup via internet (although some with registration, captcha or ip-capping), only a few allow access via phone, sms, e-mail or regular post.
There is already an iphone application existing (called plaqueVS) which makes it possible to search for carownerdata of carowners in the province of Valais (VS) only. However, this application (see screenshots) is really basic, and as there are 25 other provinces in Switzerland, not very appealing to too many users.
An iphone-application (paidversion, with free “teaser” version) which allows the iphone-user to select the canton (Vaud, Geneve, Zurich, Berner Oberland etc.) and type in the platenumber (only digits, max. 6).
Based on this data, the application shows the name, address and cityname and phonenumber.
The user should get some additional options like:
* displaying the address on google maps (within the appliction if possible)
* a “forward” button which can forward the data per email
* a “call me” button to call the car-owner
If a website (like from kanton Zurich), requires a captcha-fill in, the application will display the captcha as well, so the iphone-user can fill in the captcha-data as well.