James Cripps however ( first CONUS AO vet) carried blank 21-4138s with him ,to prove his exposure to AO at Fort Gordon.I think he made 2 post service trips there. The 21-4138, at the bottom states:
"I CERTIFY THAT the statements on this form are true and correct to the best of my knowledge and belief. SIGNATURE DATE SIGNED ADDRESS DAYTIME EVENING TELEPHONE NUMBERS (Include Area Code) PENALTY: The law provides severe penalties which include fine or imprisonment, or both, for the willful submission of any statement or evidence of a material fact, knowing it to be false." etc
So that too contains an oath , as good as a Notarized signature, and depends on what the claimant needs the info for.
It is always good to make sure the VA has contact info for anyone making any type of 'buddy' or lay statement.
The only problem either way, in order for the "Letters" to be notarized is to have the Author/Signer present and sign the "Letter" in the presence of the Notary.
You can get just about any document Notarized at your Bank/CU for free, but the Document must be signed in the presence of the Notary.
Since I became aware (Chris Attig article regarding "Sworn Affidavit") I have used the VMC Med Record Dept for any "SA" Notarization's I need.
(Which Document is better to use?) I think depends on the situation. I continue to use the 21-4138 for matters I consider of lesser importance.
At my 06/14 DRO Hearing (decided on Informal), the DRO Seemed impressed that I had used Sworn Affidavits as opposed to 21-4138. Were the "SA's" the primary reason the DRO Awarded all $$ Issues from not only the 2010 Appeal but the 2012 IU Appeal as well, doubt it and really don't care.
If the Claim/Appeal is important to you, use what the Law Pros would use, the "SA."
If you want to have reasonable accommodations given to you by your employer by having a service dog you will have to disclose your need for one. This is a great source for service dog information. http://askjan.org/media/servanim.html
Did you recently have a C&P exam? If so, it may mean that they received your exam notes, but haven't acknowleded receipt of them yet. I'm in the same boat, and I know for sure that's what it is. Once they acknowledge it, your claim should go into Prep for Decision if that is all they are waiting for.