Service Canada, for Employment and Social Development Canada (ESDC) Edition SC ISP-3004 (2025-07-04) E 1 page

Form ISP-3004 — Statutory Declaration of Common-law Union (Dual Signatures)

The one-page declaration both partners sign to show Service Canada how long you have lived together in a common-law union.

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ISP-3004 common-law declaration (CPP / OAS) · Statutory Declaration of Common-law Union (Dual Signatures)
The official Service Canada, for Employment and Social Development Canada (ESDC) form, edition SC ISP-3004 (2025-07-04) E — blank
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ISP-3004 common-law declaration (CPP / OAS) (2025) Statutory Declaration of Common-law Union (Dual Signatures) — page 1 of 1
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Fill this form online Blank PDF from Service Canada, for Employment and Social Development Canada (ESDC)

What is ISP-3004 common-law declaration (CPP / OAS)?

Some Canada Pension Plan and Old Age Security benefits depend on whether you have a common-law partner, for example the Allowance, the Guaranteed Income Supplement rate or a survivor's pension. ISP-3004 is the declaration in which you and your partner state that you live together in a common-law union, for how many years and since when.

It also asks whether there are children of the union and whether you share a lease or mortgage, other property, bank or credit accounts, or life insurance naming each other. If none of those apply, you describe other documents that show your relationship. Both of you sign it.

FileIt guides you through each question and prints the answers into Service Canada's official ISP-3004 PDF, with both names repeated in the signature block. It checks that your dates and number of years agree. The finished PDF is saved in your vault for you both to print and sign. FileIt never sends it to Service Canada.

Who fills it
The applicant, with their common-law partner
Given to
Service Canada, with the CPP or OAS application that asks for it
Pages
1
Edition
SC ISP-3004 (2025-07-04) E
Signatures
Both partners, by hand
Questions
Children of the union, joint housing, property, accounts and life insurance

Who needs to fill out ISP-3004 common-law declaration (CPP / OAS)?

  • CPP or OAS applicants who live with a common-law partner.
  • Couples applying for the Allowance or Guaranteed Income Supplement where the union matters.
  • Anyone Service Canada has asked to confirm a common-law relationship.
  • A person completing it for an applicant who can't, with proof of their authority.

When to use ISP-3004 common-law declaration (CPP / OAS)

  • When a CPP or OAS application or Service Canada letter asks for a declaration of common-law union.
  • When your marital status for a benefit changes to common-law.
  • When both partners can sign the declaration.
  • Not for immigration purposes: IRCC uses its own declaration, IMM 5409.

What you need before you start

  • Your Social Insurance Number.
  • Your full name and your partner's, and the city, county (if any) and province where you live.
  • How many years you have lived together and the dates from and to.
  • The names and dates of birth of any children of the union.
  • Whether you share a lease or mortgage, other property, accounts or life insurance, or what other documents show your relationship.

What’s on ISP-3004 common-law declaration (CPP / OAS)

The 2025 edition has 1 page. FileIt asks for it in 4 parts:

  1. You, your partner and your unionApplicant and common-law partner
  2. Question 1: Children of the unionApplicant and common-law partner
  3. Questions 2 to 4: Proof of your unionApplicant and common-law partner
  4. Who signsApplicant and common-law partner

How to fill out ISP-3004 common-law declaration (CPP / OAS), step by step

1 The declaration

Your SIN, the province or territory where you make it, your full name and where you live, your partner's name, and how long and since when you have lived together continuously.

2 Question 1: Children

Whether there are children of the union, including adopted children and children one partner has acted as a parent to, with up to two children's names and dates of birth.

3 Questions 2 and 3: Joint arrangements

Yes or No for a joint lease, mortgage or purchase agreement for your home, other jointly owned property, joint accounts, and life insurance naming your partner, or naming you.

4 Question 4: Other evidence

If none of questions 2 and 3 apply, other documents that support your relationship. The form gives two short lines.

5 Signatures

Both partners print and sign their names. If someone else completes and signs it for the applicant, they give their name, relationship, telephone number, date and address.

Common mistakes to avoid

  • Giving a number of years that the from and to dates don't support.
  • Only one partner signing a form that needs both signatures.
  • Leaving question 4 empty when none of questions 2 and 3 apply.
  • Using it for an immigration application, which needs IRCC's form instead.
  • A representative signing without sending proof that they may act for the applicant.

After you fill it out

Print the PDF; you and your partner each sign in the signature boxes.

Send it with the application or letter that asked for it. FileIt does not send it.

Keep a copy in your vault with the supporting documents, such as your lease or joint account statements.

Fill out ISP-3004 common-law declaration (CPP / OAS) online with FileIt

  1. Pick the person. Choose someone from People and FileIt fills in their name, date of birth, address and other details it already knows.
  2. Answer plain-language questions. One part of the form at a time, with the official help text beside each question — 31 fields in all. Your answers save as you go.
  3. Check the live preview. Watch your answers land on the real Service Canada, for Employment and Social Development Canada (ESDC) form, and let FileIt do any worksheet arithmetic.
  4. Generate the official PDF. FileIt prints your answers into the agency’s own PDF and files it in that person’s folder in your vault.

FileIt fills the form — it never files or submits anything for you. Deliver the finished form to whoever asked for it, the way the form’s instructions say.

Start ISP-3004 common-law declaration (CPP / OAS) now — it’s free

ISP-3004 common-law declaration (CPP / OAS): frequently asked questions

Do both partners have to sign?

Yes. This is the dual-signature version: you and your common-law partner both sign.

What counts as a child of the union?

The form includes adopted children and children of one partner whom the other acts or has acted as a parent to.

What if we don't share any accounts or property?

Answer No to those questions and describe other documentary evidence of your relationship in question 4.

Can someone fill it in for me?

Yes, if they are authorized. They complete the bottom section and must send proof that they can act for you; the form says to call 1-800-277-9914 to find out which documents.

Is this the same as IRCC's common-law declaration?

No. IRCC's IMM 5409 is for immigration. ISP-3004 is Service Canada's form for CPP and OAS.

Can I fill out ISP-3004 with FileIt?

Yes. FileIt prints your answers into the official PDF and saves it in your vault. You both print and sign it and send it in. FileIt never submits it.

Official sources

FileIt is not affiliated with or endorsed by Service Canada, for Employment and Social Development Canada (ESDC) or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts. Page last reviewed 2026-10-19.

Fill out ISP-3004 common-law declaration (CPP / OAS) online