Which Canadian Government Forms Still Require Mail in 2026

• Online is the default now for most federal services, but a paper option almost always still sits alongside it.
• You need paper when you have no online account, when your case falls outside the portal's scope, or when the agency wants a signed form with attachments.
• Pension and benefit applications (CPP, OAS/GIS, SIN) are still common paper submissions, especially for newcomers and people without a My Service Canada Account.
• CRA disputes and adjustments get mailed when documents can't be uploaded or the change can't be made online.
• Provincial filings and credit-bureau disputes still accept mailed paper forms, and in places prefer them.
• You never need a printer. PostPal prints, envelopes and mails any of these for you, then emails a dated mailing confirmation.

Here are the federal and provincial forms most often sent by paper mail in 2026, whether an online option exists, and where the verified mailing address lives. An online option changes the convenience. It doesn't change whether paper is accepted. Every form below can still be mailed.

Form	What it's for	Online option?	Where to mail
CPP retirement (ISP1000)	Canada Pension Plan pension	Yes (MSCA), or paper	CPP application
OAS / GIS (ISP3550)	Old Age Security & supplement	Yes (MSCA), or paper	OAS/GIS application
SIN application	Social Insurance Number	Online, in person, or mail	SIN by mail
Notice of Objection	Dispute a CRA assessment	Yes (My Account), or mail	CRA Notice of Objection
T1 Adjustment (T1-ADJ)	Amend a filed tax return	Often online, else mail	CRA T1 adjustment
RC66	Canada Child Benefit application	Yes (My Account), or mail	CRA RC66
Revenu Québec return	Quebec income tax return	NetFile Québec, or mail	Revenu Québec return
Credit report dispute	Fix an error on your file	Online, phone, or mail	Equifax dispute

Service Canada keeps moving applications into the My Service Canada Account (MSCA). The paper forms are still fully valid, and for people who can't register for an account they're often the only practical route.

Canada Pension Plan (CPP)

You can apply for the CPP retirement pension online through MSCA, or fill out and mail the paper ISP1000 form. One catch worth knowing: Service Canada's fillable PDF saves to your computer but cannot be submitted electronically. Use that PDF and you have to print it, sign it, and mail it. See the verified address for the CPP application (ISP1000), and the CPP disability application for that separate benefit. Reference: canada.ca — CPP retirement pension: Apply.

Old Age Security and the Guaranteed Income Supplement

OAS and the GIS go in online via MSCA, or on the paper ISP3550 form. Even when you apply online, Service Canada will often ask you to mail supporting documents afterward. The mailing address is on the OAS/GIS application (ISP3550) directory page. Reference: canada.ca — Old Age Security toolkit.

Social Insurance Number (SIN)

A SIN application goes in online, in person, or by mail. The mail route is meant for a specific set of people: those who live more than 100 km from the nearest Service Canada office, those applying from outside Canada, and anyone whose circumstances rule out an in-person visit. Find the address on the SIN application by mail page. Reference: canada.ca — Social Insurance Number: Apply.

Employment Insurance documents

EI claims are filed online. The supporting paperwork is a different story: records, declarations, and whatever Service Canada specifically asks for often go in on paper. Where mailing is required, the address is on the Employment Insurance documents directory page.

The CRA's My Account and My Business Account portals handle the bulk of routine work now. As of February 2026, notices of assessment land in those portals instead of arriving in your mailbox automatically. Several common CRA filings still go by paper though, mostly when documents have to ride along with the form.

Notice of Objection

You can file a formal objection online through My Account, by fax, or by mail. Mail stays common here because you usually want to attach a detailed explanation and supporting documents. Mind the deadline: it's the later of 90 days from the date on your notice of assessment, or one year after the return's filing deadline. Address: CRA Notice of Objection. Reference: canada.ca — Filing a formal dispute or objection.

T1 Adjustment (T1-ADJ)

Plenty of return changes can be made online now through My Account or ReFILE. When the change can't be made online, or when you need to include slips and receipts, you mail Form T1-ADJ to your CRA tax centre. Address: CRA T1 adjustment.

RC66: Canada Child Benefit

The Canada Child Benefit goes in through "Apply for child benefits" in My Account. The paper RC66 form is still accepted, and it's the usual route for newcomers and certain first-time applicants. A mailed application runs roughly 11 weeks to process against about 8 weeks online. Address: CRA RC66. Reference: canada.ca — RC66 Canada Child Benefit Application.

GST/HST returns and correspondence

Most GST/HST returns are filed electronically. Paper returns and supporting correspondence are still accepted in defined cases. Where a paper GST/HST filing applies, use the address on the CRA GST/HST return directory page.

Immigration, Refugees and Citizenship Canada has pushed most of its intake into the Permanent Residence Portal and online citizenship applications, so most applicants apply digitally now. Paper applications are still accepted in specific situations and for certain document requests.

PR card renewal

PR card renewal is usually done online. A paper application following Guide 5445 is still an accepted route for applicants who can't use the portal. Where a paper renewal is mailed, the address is on the IRCC PR card renewal directory page. Reference: canada.ca — Guide 5445 (PR card).

Citizenship

Online grant-of-citizenship applications are standard for most applicants now. Paper applications and follow-up documents still apply to some categories. Use the IRCC citizenship application page for the verified address, and the IRCC citizenship certificate page when requesting proof of citizenship by mail.

Provincial programs run their own systems. Several of them still lean on paper, or accept it without complaint.

Revenu Québec

Quebec residents file their provincial return through NetFile Québec, the recommended method, or by mail if they aren't eligible for online filing. A paper return goes to Revenu Québec and takes longer to process. Address: Revenu Québec tax return. Reference: revenuquebec.ca — Filing by mail.

RAMQ and francisation

A range of RAMQ (Quebec health insurance) documents and the Quebec francisation registration are handled on paper. See the RAMQ documents and francisation Québec (MIFI) directory pages for the correct addresses.

Ontario

In Ontario, some ServiceOntario health card updates and Landlord and Tenant Board forms go in on paper. Addresses are on the ServiceOntario health card and Landlord and Tenant Board (Ontario) directory pages.

A handful of non-tax organizations Canadians deal with regularly still take paper forms. Often mailing is the cleanest way to attach the evidence that proves your case.

Credit bureau disputes

Both Equifax Canada and TransUnion Canada take credit-report disputes online, by phone, or by mail. Mailing lets you include copies of the documents that prove the error. Addresses: Equifax Canada dispute and TransUnion Canada dispute. Reference: equifax.ca — Dispute credit report.

Student loans (NSLSC)

The National Student Loans Service Centre handles most matters online. Specific forms and supporting documents still get mailed. Address: NSLSC student loans.

Veterans Affairs Canada

Veterans Affairs Canada applications and supporting documents are often submitted on paper. Use the Veterans Affairs Canada directory page for the verified mailing address.

Can I email a form to the government instead?

Almost never. For privacy and security reasons, federal and provincial agencies don't accept these forms by ordinary email. You get two real options: the agency's secure online portal, where one exists for that form, or a printed and signed copy in the mail.

How do I know if a form can be done online?

Check the specific form's page on the agency's website. Most canada.ca and provincial form pages say plainly whether an online portal handles it. The rule of thumb for 2026: an online option exists for most common applications, the paper version is still accepted, and paper becomes required the moment you can't get into the portal or you need to attach documents.

How do I know which address to use?

Mailing addresses depend on the form, and sometimes on your province or the processing centre handling your file. Don't guess. Each form above links to a PostPal directory page where the verified, current mailing address is kept up to date. Confirm it matches your specific situation before you send.

Can I mail these without a printer?

Yes. You upload the completed form, or a document you've filled out on screen, at postpal.ca/send. PostPal prints it, puts it in an envelope, and sends it through Canada Post the next business day. No printer, no envelope, no stamp on your end.

Do I get confirmation that it was mailed?

Yes. PostPal emails you a dated mailing confirmation when your item goes out, so you have a record of the day it was sent.

Is paper mail slower than applying online?

Processing takes longer for paper. A mailed RC66, for instance, runs about 11 weeks against roughly 8 weeks online. If you have an online account and the form is supported, online wins. Paper is the dependable fallback when online isn't open to you.

Should I send originals or copies?

Send copies of supporting documents and keep the originals for your records, unless the agency's instructions specifically ask for an original signed form. The application form itself usually does need your original signature.

None of these forms are going away this year. Pension and benefit applications, CRA disputes and adjustments, a few immigration and provincial filings, credit-bureau disputes. They still travel on paper, either because no online option covers your case or because mailing is the cleanest way to include the documents that go with the form.

And here's the thing. For most people the form isn't the hard part. Printing it, finding the right envelope, and actually getting it into the mail is. PostPal takes that off your plate. Upload the completed form and it's printed, enveloped, and mailed via Canada Post the next business day for about $6, with a dated mailing confirmation emailed to you. No trip to the post office.

Mail a government form with PostPal →

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