Form 15 Motion to Change in Ontario: Which Forms You Sign, Which You Swear

Last updated: October 29, 2026

Form 15 Motion to Change in Ontario: Which Forms You Sign, Which You Swear

Quick answer: A Form 15 motion to change is how you ask an Ontario family court to change a final order or a support agreement filed with the court, such as child support, spousal support, decision-making responsibility or parenting time (Family Law Rules, Rule 15). Form 15 and the other party's Form 15B response are sworn before a commissioner for taking affidavits, while the consent forms 15C and 15D are signed in front of a witness, not sworn. Minute Notary commissions the sworn forms online by video under O. Reg. 431/20 for $24.95 per seal plus HST; we do not fill them in or give legal advice.

A final order or filed agreement reflects your situation when it was made. When the paying parent loses a job or earns more, a child moves, or a parenting schedule stops working, a motion to change in Ontario family court, under Rule 15, is how you change a support order or a parenting arrangement. This guide covers which forms you need, what goes with them and how the other party responds. It also shows which forms you swear, which you only sign in front of a witness, and how to have the sworn ones commissioned online. If you have a question about your appointment, contact us or call (613) 434-5555.

Two different Form 15As. The Family Law Rules no longer have a Form 15A: the old Change Information Form was revoked on September 1, 2020, and its questions are now part of Form 15. The Small Claims Court Form 15A is a different document, the Notice of Motion and Supporting Affidavit; see our guide to Small Claims Forms 15A and 15B for that one.

Caption: Form 15 has a commissioner's jurat on page 7. On a video appointment you swear or affirm out loud, then sign while the notary watches.

Key Takeaways

What a Motion to Change Is in Ontario Family Court

Rule 15 of the Family Law Rules (O. Reg. 114/99) applies only to a motion to change a final order, a support agreement filed under section 35 of the Family Law Act, or a family arbitration award filed under section 59.9 of that Act (r. 15(2)). A temporary order is different: you change it with an ordinary motion under Rule 14 (r. 14(1)), which needs a notice of motion and a Form 14A affidavit (r. 14(9)).

The Ministry of the Attorney General's guide to motions to change describes three routes:

You bring the motion in the court where a new case would start (r. 15(4)). To change support in a separation agreement, the agreement must already be filed with the court: Form 15 says you "can only use this form to change support terms in an agreement that has been filed", and Form 15D says that otherwise you "must file the agreement and Form 26B (Affidavit for Filing Domestic Contract with Court) before bringing this motion to change." Form 26B is sworn too (Form 26B, sworn online). If there is no final order or filed agreement yet, see our guides to separation agreements and the Form 36 affidavit for divorce instead.

The Form 15 Motion to Change: What It Asks and Why It Is Sworn

Form 15 is the motion to change form Ontario family courts use when the other party does not agree. The current version is FLR 15, dated September 1, 2021. It runs eight pages, and you can download it from Ontario Court Forms as a PDF or a Word file.

A note beside the jurat says the form "is to be signed in front of a lawyer, justice of the peace, notary public or commissioner for taking affidavits", and the Ministry's steps to making a motion to change say the same: "this form must be signed in front of a commissioner for taking affidavits."

An affidavit instead of Parts C and D. The note at the top of Part C says you must either complete the rest of the form or "complete a separate affidavit (Form 14A)". Rule 15(22) allows this, and the affidavit becomes part of the motion. It must keep to your own knowledge and name the source of anything you learned from someone else (r. 15(24), applying r. 14(18) and (19)). Our free Form 14A template lays it out.

Issuing. Once Form 15 is sworn, the clerk signs, dates and seals it and gives you a court file number. The Ministry's guide says that in the Superior Court you schedule the first date yourself, usually a case conference.

What a notary can and cannot do: A notary public confirms your identity, administers the oath or affirmation, watches you sign and commissions Form 15, Form 15B and the affidavits that go with them, and can witness a Form 15C or 15D signature in person. A notary does not choose your forms, word the changes you ask for, calculate support or advise on your chances. For help with the content, a Family Law Information Centre offers free information, and Legal Aid Ontario duty counsel can review court forms you completed or need to complete. For advice on your case, see a family lawyer.

Documents That Go With Form 15

Rule 15(5) says you serve and file Form 15 "with all required attachments". The last page of the form lists them, and Rules 13 and 15 add the details.

Form 15 notes that a person receiving support who asks only for the table amount of child support does not need a financial statement, which matches Rule 13(1.3).

Serving. The issued Form 15 and everything with it go out with a blank Form 15B and a blank Form 15C (r. 15(6)), by special service (r. 15(7)), through "someone other than you (who is at least 18 years old)", as the form puts it. Any assignee, such as a social assistance agency, is served as if it were a party (r. 15(11)), and in some recalculated Divorce Act cases the Family Responsibility Office too (r. 15(8.1)). The person who served then swears a Form 6B affidavit of service (Form 6B, sworn online).

Responding: Form 15B

If you are served with a motion to change, you have 30 days after you receive it to answer, or 60 days if you were served outside Canada or the United States (r. 15(10)). You have two choices (r. 15(9)):

• You agree, or you both agree to a different change: complete your parts of Form 15C, return a signed copy to the person who brought the motion, and give a copy to any assignee.
• You disagree, or you want a different change: serve and file a Form 15B, Response to Motion to Change, with all required attachments.

Form 15B is sworn. Part A opens with "I swear/affirm that the following is true", you list which paragraphs of their Form 15 you agree and disagree with and why, and Parts B to D set out any changes you want yourself. The form ends with a commissioner's jurat, and the Ministry's steps in responding say: "This form must be commissioned." As with Form 15, you may use an affidavit instead of, or as well as, Parts C and D (r. 15(23)).

If support is in issue, you serve and file your financial statement within the same time (r. 13(4.2)). If parenting or contact is in issue, you complete a Form 35.1.

If you do nothing. Under Rules 15(14) and 1(8.4), you lose the right to notice of further steps and to take part, and the court may deal with the case without you. The person who brought the motion can then ask for the order they wanted on a Form 14B motion form (r. 15(15)).

Caption: The 30 days to respond start when you receive the motion to change. Book the commissioning of your Form 15B well before the last day.

If the Other Party Agrees: Forms 15C and 15D

If you, the other party and any assignee agree on the change, you do not need Form 15.

The witness rule. Both consent forms carry a note above the signature lines. Form 15C's reads: "The parties do not need to sign this consent at the same time. Each party must sign in the presence of his or her witness who shall sign immediately after that party. The witness cannot be one of the parties." The form adds that a witness who does not know the party should see identification. The witness adds their name, address and phone number. The form does not ask for a lawyer, notary or commissioner, and there is no oath.

Assignees. If support was assigned to an agency, for example while the recipient received social assistance, the agency must also consent (r. 15(17)), and its consent block on the form is witnessed as well.

Once the consent is filed, a judge may make the order, ask for more material, or ask one or both of you to come to court (r. 15(25)).

Caption: Forms 15C and 15D are not sworn. Each party signs in front of a witness who is not a party, and the witness signs right after.

The online alternative for child support. A motion to change child support in Ontario is not the only route. For simple cases, the Ministry's Child Support Service can update child support without going to court. Its conditions include: one parent has the children 60% of the time, everyone lives in Ontario, and the paying parent is not self-employed and earns between $12,000 and $150,000 a year. It costs a non-refundable $80 each time (a fee waiver exists for low-income households), and its notice goes to the Family Responsibility Office for enforcement.

Common Mistakes to Avoid

• Looking for Form 15A. The family Form 15A no longer exists. Complete Parts C and D of Form 15, or attach an affidavit.
• Using Form 15 for a temporary order. Rule 15 is for final orders and filed agreements; a temporary order is changed by a motion under Rule 14.
• Serving it yourself, or without the blank forms. Someone else who is at least 18 serves it by special service, with blank Forms 15B and 15C.
• Missing the 30 days. A response or consent that comes too late can lead to an order being made without your input.
• The wrong witness on a consent. The witness cannot be one of the parties, and signs right after the person they watched sign.
• Leaving out the assignee. If an assignee was not served, the changed order can be set aside as far as it affects the assignee (r. 15(13)).
• Signing a sworn form early. Sign Form 15 and Form 15B only after the oath or affirmation, in front of the commissioner.

How the Signing Works with Minute Notary

Why the sworn forms can be done by video. The Commissioners for Taking Affidavits Act requires an oath to be taken in the commissioner's physical presence unless the regulations provide otherwise (s. 9(1) and (2)). O. Reg. 431/20 provides otherwise: you can swear or affirm by video if you and the notary can see, hear and talk to each other in real time for the whole appointment, the notary confirms your identity, and the notary makes sure you understand what you are signing. The printed jurats on Forms 15 and 15B have no wording for a remote oath, so the notary uses the modified jurat the regulation requires, stating that the oath was administered under O. Reg. 431/20 and where each of you was.

1. Finish every form first. Complete Form 15 (or 15B) and any Form 13, 35.1 or 14A that goes with it, and leave them unsigned. Have your court file number, if you have one, and the full legal names of the parties ready.
2. Book the appointment. Book online and choose General affidavit - subject to notary review, or contact us or call (613) 434-5555. Tell us how many sworn documents and exhibits you have. The notary reviews the documents before confirming they can be done remotely. Appointments run every day, 8:00 AM to 8:00 PM (Ottawa time).
3. Upload the unsigned documents and your photo ID when you book.
4. On the call: show valid government photo ID, swear or affirm out loud, and sign each sworn document while the notary watches. Form 15 also has a certificate on page 4 that you sign and date.
5. The notary completes each jurat for a remote oath, signs and applies the seal. You receive the commissioned documents as PDFs.
6. You file and serve them. You can file family documents online or at the courthouse.

For a Form 15C or 15D, each party can sign in front of any witness who is not a party. If you want a notary as your witness, book a mobile visit: witnessing a signature is done in person, not by video. If the two of you sign at different times or places, each visit is a separate trip with its own travel fee.

Online or at the courthouse? The Ministry's guide notes that every family court office has commissioners who commission financial statements for free; ask your court office about your other forms. A video appointment with us suits you if you would rather not travel or need an evening or weekend time close to a deadline. If you are unsure whether your court office takes a remotely commissioned document, ask it before you file.

Pricing

Note: prices are before HST. Example: a motion to change child support with Form 15 and a Form 13 financial statement, both commissioned online at one appointment, is 2 seals, $49.90 plus HST. We commission and witness; we do not prepare the forms or give legal advice.

See every posted rate on our pricing page.

Frequently Asked Questions

What is a Form 15 motion to change?

Form 15, Motion to Change, is the Ontario family court form you use to ask the court to change a final order, a support agreement filed with the court, or a filed family arbitration award (Family Law Rules, Rule 15). It can cover child support, spousal support, decision-making responsibility, parenting time and contact. You serve it on the other party by special service, and they have 30 days to respond, or 60 if they were served outside Canada or the United States.

Do I still need a Form 15A Change Information Form?

No. The Family Law Rules' Form 15A was revoked on September 1, 2020 by O. Reg. 373/20. The questions it used to ask are now in Parts C and D of Form 15, which you swear or affirm. Instead of completing Parts C and D, you may use an affidavit, usually a Form 14A (Rule 15(22)).

Can I swear Form 15 online?

Yes. Form 15 is sworn or affirmed: Part C opens with "I swear/affirm that the following is true" and page 7 has a commissioner's jurat. The Commissioners for Taking Affidavits Act allows the oath by video under O. Reg. 431/20 when you and the commissioner can see, hear and talk to each other throughout, your identity is confirmed, and the jurat is modified to say so. If you are unsure about your court's practice, ask the court office before you file.

Do I need a financial statement with a motion to change?

If you ask to change child or spousal support, usually yes. Rule 13(4.2) requires the party making the motion to serve and file a financial statement (Form 13 or 13.1) with Form 15, and the other party to file one within the time to respond. The exceptions are a support recipient asking only for the table amount of child support, parties to a Form 15C who agree in the form not to file statements, and a Form 15D consent motion to change child support.

What if my ex agrees to the change?

Then you can go ahead on consent. Use Form 15C, Consent Motion to Change, for any agreed change, or Form 15D if you are changing child support only (Rule 15(17) and (18)). These forms are not sworn: each party signs in the presence of a witness, who signs right after them and cannot be one of the parties. You file them with a draft order and the other documents the rule lists.

Can I change child support in Ontario without going to court?

Sometimes. For simple cases, the Ministry's online Child Support Service can update child support without a court, for a non-refundable $80. Its conditions include one parent having the children 60% of the time, everyone living in Ontario, and a paying parent who is not self-employed and earns between $12,000 and $150,000 a year.

How do I respond to a motion to change?

Within 30 days after you receive it, or 60 if you were served outside Canada or the United States, either return a signed Form 15C if you agree, or serve and file a Form 15B, Response to Motion to Change, if you disagree or want a different change (Rule 15(9) and (10)). Form 15B is sworn. If support is in issue, you also serve and file a financial statement within the same time.

Is Family Law Form 15A the same as Small Claims Form 15A?

No. In the Small Claims Court, Form 15A is the Notice of Motion and Supporting Affidavit, the form for bringing a motion in a small claims case (Rule 15.01(1) of the Small Claims Court Rules). The Family Law Rules no longer have a Form 15A at all; a family motion to change uses Form 15.

Can a notary fill in the motion to change forms for me?

No. The notary confirms your identity, administers the oath or affirmation, watches you sign and commissions the sworn forms, or witnesses a consent signature in person. We do not choose the forms, write your reasons, calculate support or give legal advice. A Family Law Information Centre offers free information, Legal Aid Ontario duty counsel can review court forms, and a family lawyer can advise on your case.

How much does it cost to have Form 15 commissioned online?

$24.95 per seal, plus HST. Form 15 is one seal for the person who swears it, and each other sworn document, such as a Form 13 financial statement or a Form 35.1 affidavit, is another seal. Each exhibit to an affidavit is one more stamp. Online payments also carry a card processing fee of 2.9% + $0.30, shown as its own line before you pay.

Final Recommendation

Start by working out which route you are on: no agreement means Form 15, agreement means Form 15C, and agreement on child support alone means Form 15D. Gather the order or filed agreement, your financial statement if support is changing, and a Form 35.1 if parenting is. If you are unsure what to ask for or how to word it, talk to a Family Law Information Centre, duty counsel or a family lawyer first. When your Form 15 or 15B is final, swear or affirm it before a commissioner, at the court office or online with us, and have it served by special service with the blank response forms.

Book Your Appointment

Need your Form 15 motion to change or Form 15B response commissioned? Minute Notary commissions them by secure video for $24.95 per seal plus HST, with your financial statement and affidavits at the same appointment.

• Contact us: Ask a question or request an appointment
• Call: (613) 434-5555
• Service page: Affidavits
• Free template: Form 14A, for the facts behind your motion
• Related guide: Form 13 financial statement, for support changes
• Hours: Every day, Saturday and Sunday included, 8:00 AM to 8:00 PM (Ottawa time)

Sources

• Family Law Rules, O. Reg. 114/99 (Ontario), r. 1(8.4), r. 13, r. 14(1) and r. 15
• O. Reg. 373/20, amending the Family Law Rules (revokes Form 15A), ss. 4, 6 and 7
• Ontario Court Forms — Form 15: Motion to Change, FLR 15 (September 1, 2021) (PDF)
• Ontario Court Forms — Form 15B: Response to Motion to Change (PDF)
• Ontario Court Forms — Form 15C: Consent Motion to Change (PDF)
• Ontario Court Forms — Form 15D: Consent Motion to Change Child Support (PDF)
• Ontario Court Forms — Family Law Rules forms
• Ministry of the Attorney General — Guide to procedures in family court: Motions to change a final order or written agreement
• Ministry of the Attorney General — Guide to procedures in family court: Steps to making a motion to change
• Ministry of the Attorney General — Guide to procedures in family court: Steps in responding to a motion to change
• Ministry of the Attorney General — Guide to procedures in family court: Consent motion to change
• Ontario — Set up or update child support online
• Small Claims Court Rules, O. Reg. 258/98 (Ontario), r. 15.01
• Ontario — Family Law Information Centres
• Commissioners for Taking Affidavits Act, R.S.O. 1990, c. C.17 (Ontario), s. 9
• O. Reg. 431/20: Administering Oath or Declaration Remotely (Ontario)