22 CFR §511.5

1. (a)Claims for loss or damage of property may be filed by the owner of the property, or his/her legal representatives. Claims for personal injury or death may be made by the injured person or a legal representative of the injured or deceased person. The claim, if filed by a legal representative, should show the capacity of the person signing and be accompanied by evidence of this authority to act.
2. (b)The claim and all other papers requiring the signature of the claimant should be signed by him/her personally or by his/her representative. Signatures should be identical throughout.