Preparing an SS-4 for Someone Else: Authorized Signature and Designee Are Different
· 7 min read
The practical answer
The person who types an application, the person designated to discuss it, and the person authorized to sign it may have different roles. A complete preparation file should explain those roles before a signature is requested or an application is transmitted. Three details shape the review: Who prepared the draft? Who is authorized to sign this SS-4? Is designee authority being mistaken for signing authority?[1, p.6] [2, p.1]
Scope and the records behind the answer
The discussion follows the entity, form and transaction conditions identified below. The same label on a different form can have a different purpose. Keep the relevant entity and reporting period visible while you compare the requirements, and treat each stated exception as part of the rule rather than an optional footnote.
Official sources checked: 2026-11-09. Annual tax-year forms and continuously revised forms are identified separately in the references.
A side-by-side preparation table
| Item or question | Official rule or instruction | Conditions and limits | Source |
|---|---|---|---|
| Designee scope | The third-party designee may answer questions about the completed SS-4 and receive the new EIN. Signed authorization is required, and that authority ends when the EIN is assigned and released to the designee. | Apply this entry within the entity, form and period described here; read the cited passage for the surrounding context. | [1, p.6] |
| Authorized signer | The authorized SS-4 signer depends on the type of applicant. A foreign applicant may use a person with appropriate authorization to sign. | Apply this entry within the entity, form and period described here; read the cited passage for the surrounding context. | [1, p.6] |
| Field/section Third party designee: Third Party Designee | Complete the individual's name, contact details and address only when authorizing that individual to answer questions and receive the new EIN. Authority ends when the EIN is assigned and released to the designee. | Apply this entry within the entity, form and period described here; read the cited passage for the surrounding context. | [2, p.1] [1, p.6] |
| Field/section Signature / date / name and title: Signature Date | The appropriately authorized person for the applicant type signs, dates and identifies their name and title. Third-party designee authorization requires completion of the signature section. | Apply this entry within the entity, form and period described here; read the cited passage for the surrounding context. | [2, p.1] [1, p.6] |
| Field/section 2: Trade name of business (if different from name on line 1) | Complete this line only if the trade name or DBA differs from the legal name on line 1. | Apply this entry within the entity, form and period described here; read the cited passage for the surrounding context. | [2, p.1] [1, p.3] |
| Field/section 5a: Street address (if different) (Don’t enter a P.O. box.) | Provide the physical address only if different from the mailing address. Do not enter a P.O. box here. | Apply this entry within the entity, form and period described here; read the cited passage for the surrounding context. | [2, p.1] [1, p.3] |
Work through the official requirements
Designee scope
The third-party designee may answer questions about the completed SS-4 and receive the new EIN. Signed authorization is required, and that authority ends when the EIN is assigned and released to the designee.[1, p.6]
Authorized signer
The authorized SS-4 signer depends on the type of applicant. A foreign applicant may use a person with appropriate authorization to sign.[1, p.6]
Field/section Third party designee: Third Party Designee
Complete the individual's name, contact details and address only when authorizing that individual to answer questions and receive the new EIN. Authority ends when the EIN is assigned and released to the designee.[2, p.1] [1, p.6]
Field/section Signature / date / name and title: Signature Date
The appropriately authorized person for the applicant type signs, dates and identifies their name and title. Third-party designee authorization requires completion of the signature section.[2, p.1] [1, p.6]
Field/section 2: Trade name of business (if different from name on line 1)
Complete this line only if the trade name or DBA differs from the legal name on line 1.[2, p.1] [1, p.3]
Field/section 5a: Street address (if different) (Don’t enter a P.O. box.)
Provide the physical address only if different from the mailing address. Do not enter a P.O. box here.[2, p.1] [1, p.3]
Not entity election
Checking an entity-type box on SS-4 is not itself an entity-classification tax election.[1, p.4]
Field/section 1: Legal name of entity (or individual) for whom the EIN is being requested
Enter the applicant's legal name consistently with its applicable formation or other legal documents.[2, p.1] [1, p.2]
Field/section 7b: SSN, ITIN, or EIN
Generally enter the responsible party's SSN or ITIN. Review the government-entity EIN exception and the foreign/N/A exception separately under their respective conditions.[2, p.1] [1, p.3]
An illustrative preparation scenario
In this hypothetical preparation example, an assistant completes a draft using information from the owner and a professional contact. The signature area is left for review rather than copied from the assistant's email footer. The preparer identifies the applicable signer and documents why that person can sign this application. The preparer checks three points: Who prepared the draft? Who is authorized to sign this SS-4? Is designee authority being mistaken for signing authority? The file remains a working comparison until the relevant facts and applicable instructions have been checked together. No agency outcome is assumed.[1, p.6] [2, p.1]
This is a planning illustration, not a statement that a particular filing has been accepted or that an entity qualifies for a tax result. Use the source-backed distinctions above to decide what information still needs to be established before a form is completed.
A review sequence you can actually use
- Who prepared the draft?
- Who is authorized to sign this SS-4?
- Is designee authority being mistaken for signing authority?
Write down the answer and the record that supports it, rather than marking a question complete because a field contains text. When two records disagree, identify whether the difference concerns the entity, an individual, the reporting period or the type of change. That makes the remaining question specific enough to resolve against the relevant instruction.
Keep the scope of a preparation service separate from the government requirement. A service intake question may gather information for a workflow; it does not create an exception, extend a deadline or determine whether a transaction is reportable. The cited government material remains the basis for those conclusions.
Questions to settle before moving forward
How should I check field/section third party designee: third party designee?
Complete the individual's name, contact details and address only when authorizing that individual to answer questions and receive the new EIN. Authority ends when the EIN is assigned and released to the designee. [2, p.1] [1, p.6]
How should I check field/section signature / date / name and title: signature date?
The appropriately authorized person for the applicant type signs, dates and identifies their name and title. Third-party designee authorization requires completion of the signature section. [2, p.1] [1, p.6]
How should I check field/section 2: trade name of business (if different from name on line 1)?
Complete this line only if the trade name or DBA differs from the legal name on line 1. [2, p.1] [1, p.3]
How should I check field/section 5a: street address (if different) (don’t enter a p.o. box.)?
Provide the physical address only if different from the mailing address. Do not enter a P.O. box here. [2, p.1] [1, p.3]
Official sources and versions
- Instructions for Form SS-4 (Rev. December 2025) — Rev. December 2025
- Form SS-4 (Rev. December 2025) — Rev. December 2025
Get help with the relevant SpeedEIN workflow
SpeedEIN offers preparation and support for the situations described on its service pages. If you would like assistance, review the relevant service scope, supported entities and current availability before ordering. The service does not replace the government’s decision or remove an obligation imposed by the applicable rules.