Dear carlosjovi,
I am very pleased to provide you an innovative solution for your project. My solution is not to provide you a captcha but I have a hidden technique which will detect the robots, all you have to provide me is the form file, if the processing file is different than the form file then both the form and the processing files should be provided.
It would be better to provide the required files before accepting the bid to evaluate the project. Thanks.
Look forward to working with you soon.
Best Regards,
Rose Office