ARP-109, the Security Interest Affidavit, is a form of the San Bernardino County Assessor-Recorder-County Clerk, listed among the Assessor's forms and one of the San Bernardino County property tax forms on the county's forms page. It has two parts: the party removed from title states whether they had an equitable or beneficial interest in the property, and the party retaining title supports the affidavit with payment records. On this page you can fill out the form online on FillingPDF and download or print the completed PDF; the form and its latest version are published by the county at arc.sbcounty.gov.
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What is ARP-109?
ARP-109: Security Interest Affidavit is a San Bernardino County Assessor-Recorder-County Clerk form in which a party removed from title attests, under California law, whether they had or had no equitable or beneficial interest in a parcel of real property during a stated period.
The front of the form is headed "To be completed by the party removed from title." That party enters the period (from and to), the deed number or numbers the period refers to, the property address, the Assessor's Parcel Number and the reasons for the statement, then signs a declaration made under the laws of the State of California that it is true, correct and complete to the best of their knowledge and belief.
The second half, "To be completed by the party retaining title," lists the documents that must be attached in support of the affidavit and carries its own declaration and signature lines. Copies of the documents cannot be returned, so the form tells you to keep your originals.
The county lists the form under the Assessor on its forms page. The printed revision is ARP 109 Rev. (01-25). The same page carries a Spanish-language version, Declaración de Interés de Seguridad, with the same sections.
Who needs to file ARP-109?
Two parties complete this form, each in its own section.
- The party removed from title completes the affidavit: the period, deed number(s), property address, Assessor's Parcel Number, whether they had or had no equitable or beneficial interest, the reasons, and the signed declaration.
- The party retaining title completes the second section: the supporting documents listed on the form are attached, and the party signs a declaration of their own.
Each section has two signature and print-name lines, so more than one person can sign on each side. The form does not describe who may sign for someone else, so contact the Assessor-Recorder-County Clerk at (909) 382-3262 if a representative will sign. The form does not say which transfers or situations require it; check with the office if you are unsure whether it applies to your transaction.
When to file ARP-109
The form prints no due date. It is completed when a party has been removed from title and the affidavit is needed for the property it describes. The affidavit covers a period that you enter yourself and ties it to deed numbers, so gather those dates and deed numbers first. The party retaining title also needs the payment records listed on the form before signing: proof of the down payment, proof of monthly mortgage payments, Schedule A of federal income tax returns and Form 1098 Mortgage Interest Statements. For any deadline that applies to your case, contact the office at (909) 382-3262.
Documents you need
- Proof of down payment, such as copies of cancelled checks, cashier checks, money orders or bank statements; attached by the party retaining title.
- Proof of monthly mortgage payments, such as copies of cancelled checks, cashier checks, money orders or bank statements; attached by the party retaining title.
- Schedule A – Federal Income Tax returns, attached in support of the affidavit by the party retaining title.
- Form 1098 Mortgage Interest Statements, attached in support of the affidavit by the party retaining title.
- Copies only: the form states that copies of documents cannot be returned, so keep the originals for your records.
How to fill out ARP-109
Identify which section is yours
The front is split into "To be completed by the party removed from title" and "To be completed by the party retaining title." Each party completes only its own section.
Enter the period and deed numbers
In the affidavit statement, enter the period from and to, and the deed number(s) the period refers to.
Select had or had no interest
Choose whether you had or had no equitable or beneficial interest in the real property.
Describe the property and your reasons
Enter the property address and the Assessor's Parcel Number, then state the reasons for your statement in the space provided.
Complete the declaration and signatures
Enter the place (California) and the date, then sign and print your name. Use the second signature and print-name line if another person signs.
Add telephone numbers
Enter the Office number with extension, if any, and the Residence number beneath the signatures.
Gather the supporting documents
The party retaining title attaches copies of proof of down payment, proof of monthly mortgage payments, Schedule A of the federal income tax returns and Form 1098 Mortgage Interest Statements.
Complete the retaining party declaration
In the second section, enter the place and date of the declaration, then sign and print the name, with telephone numbers, as above.
Review and download the PDF
Check both sections against the form, then download or print the completed PDF from FillingPDF and assemble it with the copies of your documents as described under How to submit.
How to submit ARP-109
The form itself names no mailing address, portal or appointment rule. Its letterhead identifies the office that issues it:
- Office: San Bernardino County Assessor-Recorder-County Clerk, 222 W. Hospitality Lane, 4th Floor, San Bernardino, CA 92415-0311.
- Phone: (909) 382-3262.
- Website: arc.sbcounty.gov, where the county publishes the form.
Call or check the website to confirm how and where to deliver the completed affidavit and attachments. Send copies of the supporting documents, not originals: the form states that copies cannot be returned and asks you to keep the originals for your records. If a fee applies, the form does not mention one, so ask the office. FillingPDF lets you fill out and download the PDF; submission follows the county's channels.
Common mistakes to avoid
- Sending original documents with the affidavit; the form says copies cannot be returned and tells you to keep the originals.
- Leaving out one of the four supporting items listed for the party retaining title: down payment proof, monthly mortgage payment proof, Schedule A or Form 1098.
- Completing only the party removed from title section and skipping the section for the party retaining title, which has its own declaration and signatures.
- Not choosing between "had" and "had no" equitable or beneficial interest in the affidavit statement.
- Leaving the period (from and to), the deed number(s) or the Assessor's Parcel Number blank, so the affidavit cannot be tied to the property.
- Omitting the place and date from the declaration, which reads "I declare at __, California, on ____ 20".
- Signing without printing the name on the line beside the signature.
Frequently asked questions
What is ARP-109, the Security Interest Affidavit?
ARP-109 is a San Bernardino County Assessor-Recorder-County Clerk form. The party removed from title attests whether they had or had no equitable or beneficial interest in a property for a stated period, and the party retaining title supports it with attached records.
Is ARP-109 one of the San Bernardino County property tax forms?
It appears on the county's forms page with the Assessor as the office, alongside the other San Bernardino County Assessor forms. The form itself does not describe a tax or fee; contact the office at (909) 382-3262 for how it applies to you.
Who completes the ARP-109 Security Interest Affidavit?
Two parties: the party removed from title completes the affidavit and signs a declaration, and the party retaining title attaches the supporting documents and signs its own declaration. Each section has two signature lines.
What documents do I attach to the ARP-109?
The party retaining title attaches proof of the down payment, proof of monthly mortgage payments, Schedule A of federal income tax returns and Form 1098 Mortgage Interest Statements. Bank records can be cancelled checks, cashier checks, money orders or bank statements.
Will I get my documents back after submitting them?
No. The form states that copies of documents cannot be returned and asks you to keep your original documents for your records. Attach copies only.
Is there a Spanish version of the Security Interest Affidavit?
Yes. The back of the county's PDF carries the Spanish version, Declaración de Interés de Seguridad, with the same sections and the same list of supporting documents.
Can I fill out ARP-109 online?
You can fill out the PDF online on FillingPDF and download or print it. FillingPDF is an independent service and does not file the affidavit with the county; you deliver it through the Assessor-Recorder-County Clerk's channels.
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