What is required when filing an original claim for disability compensation according to 38 CFR 3.151?

When filing an original claim for disability compensation, the requirement of submitting VA Form 21-526EZ with the claimant's signature is central to the process. This specific form is designed to streamline the application for disability compensation by enabling veterans to provide all necessary information in a standardized format.

VA Form 21-526EZ includes essential details such as the veteran's military service history, any disabilities they claim are service-connected, and allows for the authorization for the VA to obtain relevant medical evidence. By ensuring that the form is signed by the claimant, the VA verifies that the individual endorses the information presented and consents to the processing of their claim. This form is crucial as it is foundational to the claims process, ensuring that the VA has all the necessary details to assess the veteran's eligibility for benefits.

The other options provided, such as a notarized letter, a personal statement, or a letter from a medical professional, do not fulfill the primary requirement set forth in 38 CFR 3.151 for initiating the claim process. These documents may be useful as supplementary evidence during the claims process but do not replace the requirement for the designated form and signature on it.