A job applicant should print his post-interview, thank-you note on a quality bond paper. Alternately, a high-grade stationery paper with a matching envelope is also suitable for a thank-you note.
If the applicant prefers stationery paper to bond paper, he must use one that's appropriate in the business setting. The paper must not have any sayings or cutesy art. When composing a thank you-note, the applicant must include the exact heading and business letter format he used in his resume and cover letter. Handwriting the message of appreciation leaves a better impression to the hiring manager, but printing the letter is also appropriate if the applicant's handwriting is illegible.