To avoid mistakes and wrong information about you, do try to double check your resume or CV before sending it out. Double check the grammar, the personal information and make sure that the employer information is also correct to save yourself from embarrassment. If you are preparing a few applications at the same time, better be sure that the letters and resume are placed into the correct envelopes under the appropriate addresses. Employers will surely ask for your certificates so attach copies of certificates in advance. And in case you will be granted with a job interview, keep a copy of the document for reference. And if you have done all these, you are ready to send them out.