The Third-Party Designee on Form SS-4, Explained

You are filling out Form SS-4 to get an EIN for your new Wyoming LLC, the form is going smoothly, and then you hit a section near the bottom labeled "Third Party Designee." If you are a founder in Lisbon with no SSN, working through this entirely from your laptop, that box can feel like a trap. It is not. It is one of the more useful lines on the whole form, and it can save you weeks of waiting on hold with a US tax agency in a timezone nowhere near yours.

What is the third party designee on Form SS-4?

The SS-4 third party designee is a person you authorize, by name, to receive your EIN from the IRS and to answer the agency's questions about your Form SS-4 application. The designee section sits at the bottom of the form, just above where you sign, and you fill it in only if you want someone other than yourself to speak with the IRS about that specific application.

The form is the Application for Employer Identification Number, issued by the IRS. An EIN is the federal tax ID number your US LLC needs to open a bank account, file taxes, and identify itself to vendors and payment processors. Naming a designee does not hand over control of your company or your taxes. It is narrow on purpose.

What can the designee do, and what can it not do?

The authority you grant on the SS-4 is limited to the EIN application itself, and it ends as soon as the EIN is issued. Here is the practical scope:

  • The designee can receive the EIN directly from the IRS once the number is assigned.
  • The designee can answer IRS questions about the information on that one Form SS-4.
  • The authority automatically expires the moment the EIN is issued. It is not an ongoing power of attorney.
  • The designee cannot file your tax returns, change your responsible party, or represent your company in any other tax matter.
  • You still sign the form yourself as the applicant. The designee signs only the designee line.

If you need someone to represent you for broader tax matters, that requires a separate IRS form, Form 2848 (Power of Attorney). The SS-4 designee line is not a substitute for it, and you should not treat it as one.

What information goes in the third party designee section?

The third party designee section asks for the designee's name, address, and phone number, plus a fax number if you have one, so the IRS knows exactly who is allowed to receive the EIN and answer questions about your SS-4. If you are handling the application yourself, you leave the entire designee block blank.

The fields you fill in are straightforward:

  1. Designee's name, the full legal name of the individual you are authorizing.
  2. Designee's telephone number, used by the IRS to reach them about the application.
  3. Designee's address and ZIP or postal code.
  4. Designee's fax number, which matters because the fax channel is how many international applicants receive the EIN.

One detail trips people up: the responsible party named higher up on the SS-4, which for a single-member LLC is usually you, is a separate concept from the designee. The responsible party is the human who ultimately controls the entity. The designee is just the messenger for this one application. Do not confuse the two lines.

How do non-residents file the SS-4 and handle the designee?

Non-resident founders without an SSN cannot use the IRS online EIN tool, so they file Form SS-4 by fax or mail to the IRS, and many name a third party designee precisely because they have no US phone line for the IRS to call back. The online application requires a US taxpayer ID number that most non-residents do not have, which is why the paper or fax route is the normal path for foreign owners.

When you have no SSN or ITIN, you simply write "Foreign" in the box that asks for the responsible party's identifying number on line 7b. The IRS accepts this. You then send the completed SS-4 to the fax number the IRS publishes for international applicants, and you wait. By fax, getting the EIN back typically takes a few weeks, and that timing is controlled entirely by the IRS. No service, agent, or designee can promise you a specific date, and you should be skeptical of any that does.

This is where the designee line earns its place. If you list a designee with a US fax number and phone, the IRS sends the EIN to that designee and contacts them with any follow-up questions, rather than trying to reach a founder asleep eleven hours away. For a founder in Lisbon with no fax machine at home, a reachable US-based designee receiving the number is often the difference between a clean three-week turnaround and a stalled application.

What designee mistakes do non-residents make most often?

The designee section is small, but errors here cause real delays. The most frequent ones:

  • Filling in the designee block when you intend to handle everything yourself, which can route the EIN somewhere you did not expect.
  • Naming a designee with no working US fax or phone, defeating the entire purpose of the line.
  • Forgetting to sign the applicant line because the designee signed the designee line. Both signatures are needed when a designee is used.
  • Listing a company or service name where the form asks for an individual designee's name.
  • Assuming the designee can later file taxes or change company details. It cannot. The authority ends at EIN issuance.

How do you get your EIN without an SSN?

You can get an EIN without an SSN by filing Form SS-4 with the IRS, writing "Foreign" for the responsible party's tax ID, and sending it by fax or mail, and the EIN itself is always free from the IRS. You never pay the IRS for the number. You may pay a service to prepare and file the application correctly, but the nine-digit EIN carries no government fee.

If you would rather not assemble the SS-4, manage the designee line, and chase a US fax channel yourself, a formation service built for foreign founders can do it as part of forming the company. CORPBOLT is a U.S. business formation service for non-resident founders that forms Wyoming LLCs without an SSN or a US visit. Plans start from $349/year, with the EIN included from $599. (corpbolt.com)

Concretely, that means CORPBOLT can form your Wyoming LLC, file the SS-4 to obtain your EIN without an SSN, provide a registered agent, and give you a US business and mailing address, all fully remote with no US visit required. It can also help you get bank-ready, meaning it prepares the documents and details a bank or fintech platform will ask to see. It does not open accounts or introduce you to a bank. The financial institution always decides who it accepts, and the EIN still comes from the IRS at no charge for the number itself.

Why do non-residents pick Wyoming for the LLC?

Wyoming is a common choice for non-resident founders because it has no state personal income tax, modest annual fees, and straightforward filing through the Wyoming Secretary of State. A Wyoming LLC paired with an EIN, a registered agent, and a US address gives a foreign owner the standard set of credentials US banks and payment processors expect to see, without requiring the owner to live in or visit the United States.

What else do founders ask about the SS-4 designee?

Most follow-up questions about the SS-4 third party designee come down to whether you need one, how long the authority lasts, and what you are actually paying for. The short answers are below.

Do I have to name a third party designee on Form SS-4?

No. The third party designee section is optional. If you are filing the SS-4 yourself and can receive the EIN, leave the entire designee block blank. You name a designee only when you want someone else to receive the number and answer the IRS's questions about that application.

Does the third party designee have access to my company's taxes?

No. The designee's authority is limited to your single SS-4 application and ends the instant the EIN is issued. They cannot file returns, sign for your company on other matters, or act as your ongoing representative. Broader representation requires a separate IRS form, Form 2848.

Can a non-resident be the responsible party without an SSN?

Yes. A non-resident with no SSN or ITIN can be the responsible party on Form SS-4 by entering "Foreign" in place of a taxpayer ID number on line 7b. The IRS accepts this for foreign-owned single-member LLCs, and you then file by fax or mail rather than the online tool.

How long does the EIN take when filing by fax with a designee?

By fax, the EIN typically takes a few weeks, and the timing is set entirely by the IRS. Naming a designee with a working US fax number can help you receive the number faster in practice, because the IRS sends it to a reachable US contact, but no one can guarantee a specific date.

Is the EIN free, and what am I paying a service for?

The EIN is free from the IRS. There is no government charge for the number. When you pay a formation service such as CORPBOLT, you are paying for the work of preparing and filing the SS-4 correctly, forming the LLC, and providing a registered agent and US address, not for the EIN number itself.