After days, weeks, months or longer of interviewing, you have received a job offer that meets your needs and have decided to give notice to your employer and resign your current job.1. Get your job offer in writing. Having the offer in writing is both your legal protection against an employer should they make an attempt to deceive you with the terms of the offer AND your protection against you having made a mistake in hearing the offer. The letter should include both your new salary and position.