These Terms govern your use of Siglio, an electronic signature API operated by CE525B LLC, a Florida limited liability company doing business as Siglio ("Siglio," "we," "us"), based in Tampa, Florida. By creating an account or using the service, you agree to them.
Siglio provides an application programming interface and related developer portal for creating and managing electronic signature envelopes. You upload a PDF containing signing tags, provide signer details, and Siglio delivers signing invitations by email, SMS, or both, returns status through webhooks, and makes the signed result available as described in Section 7.
Siglio offers two environments. The sandbox environment is for development and testing and performs real end-to-end delivery to real recipients. The live environment is for production use. Each account receives 25 free sandbox envelopes, one time, which do not expire, refill, or renew. After they are used, a valid payment card on file is required to continue in either environment.
Siglio is a business tool provided to you for use in your own products and operations. It is not a consumer service.
You must be at least 18 years old and able to form a binding contract. If you use the service on behalf of a company, you represent that you have authority to bind that company, and "you" means that company.
You are responsible for your account credentials, your API keys, and all activity under them. Notify us promptly through the support form if you believe your account or a key has been compromised. Each account has a single owner login; you are responsible for anyone you allow to act through your account or integration.
Before live usage, you must provide accurate company information, a billing address, an estimated monthly envelope volume, and a valid payment card, and accept these Terms and the acceptable use provisions in Section 10.
By using the service you consent to transact with us electronically. Agreements, notices, invoices, and other communications we provide electronically satisfy any requirement that they be in writing. You are responsible for keeping a current email address on your account.
The fee is $0.25 per envelope, flat at every volume. There is no subscription fee, seat fee, or platform fee. Prices exclude any applicable taxes, which you are responsible for and which we may collect where required.
An envelope is billable when it is created, regardless of outcome. An envelope remains billable whether the recipient signs, declines, ignores it, never opens it, abandons it, or the envelope is later voided. Fees for created envelopes are non-refundable. A request that fails validation before an envelope is created is not billable.
Your first 25 sandbox envelopes are free. After that, sandbox envelopes are billed at $0.25 each and appear as a separate line item on the same invoice as live usage. Live usage is billable from the first live envelope even if free sandbox envelopes remain.
Billing runs on a monthly anniversary cycle. Your cycle begins when paid billing is activated and repeats on the same day of each calendar month. If your anniversary falls on a day a given month does not have, the cycle bills on the last day of that month.
A valid primary payment card is required for paid usage. You may add a backup card, which we will charge if the primary fails. You may not remove your primary card without designating another valid card. Small balances below our payment processor's minimum chargeable amount may roll forward to your next invoice.
Fees for created envelopes are non-refundable. Any credit or adjustment is at our discretion, decided by a person, and is not established as a course of dealing.
When you activate paid usage, the monthly envelope volume you declare becomes your initial approved monthly limit. You may raise your limit self-service up to 10,000 envelopes per month. Requests above that are reviewed by a person and may be conditioned on a refundable security deposit, ordinarily 50% of the anticipated monthly usage value, held for six consecutive on-time billing cycles, after which it may be returned. Future limit increases may trigger a new deposit review.
As you approach your approved limit: at 90% we warn you and open a 24-hour window to raise the limit or reduce sending; at 100% sending continues; at 110%, or if the 24-hour window lapses unresolved, new envelope creation stops until resolved. You may also set your own cap below your approved limit; a self-imposed cap is a hard stop with no grace band.
If your primary card fails, we charge the backup. If both fail, a five-day cure period begins with daily reminders, during which the account remains operational. If payment is not cured by the end of the fifth day, the account is fully paused as described in Section 13.
Reinstatement after an uncured default requires payment of the outstanding balance and a refundable security deposit equal to 100% of your approved monthly limit value, held for six consecutive on-time billing cycles, after which it may be refunded. Once reinstatement requirements are met, the account unpauses automatically and queued webhook events replay.
Nothing in these Terms makes Siglio a party to any document processed through the service. Siglio is not responsible for determining how long any contracts, documents, or other records must be retained under laws applicable to you, and is not responsible for producing your documents to you or to any third party after the access periods described here.
Signed documents are stored by the signing infrastructure that processes them, not by Siglio. Siglio stores envelope metadata, usage records, webhook payloads, delivery history, and account data. Signers receive a secure download link for their copy, valid for 90 days from completion, with self-service reissue to the same verified email address or phone number used on the envelope. You receive the signed result through the completion webhook.
You are solely responsible for retrieving, retaining, and backing up completed documents. Download the signed document when the completion webhook fires and keep your own copy. Siglio does not publish or commit to a retention period for signed documents and is not your system of record. If your legal or compliance obligations require retention, your own copy is the copy that satisfies them.
Electronic signatures are broadly enforceable in the United States under the federal ESIGN Act and state law, but enforceability depends on facts we do not control, including what you sign, who signs it, and how you obtained their agreement to transact electronically. Accordingly:
Signing invitations are sent to the recipients you designate, at the addresses and phone numbers you supply. You represent and warrant that for every recipient:
Recipients may opt out of SMS at any time, including by replying STOP, and we honor opt-outs across the service. We may decline to deliver to a recipient who has opted out or where delivery appears unlawful or abusive.
You may not use the service to engage in, facilitate, or attempt:
We operate risk monitoring and may request identity verification where risk signals warrant it. If verification is requested and not completed within the stated window, we may suspend the account. We may suspend immediately, without prior notice, for serious abuse. We may report unlawful activity to law enforcement.
API keys are credentials. Keep them secret, do not embed live secret keys in client-side code, and rotate them if you suspect exposure. You are responsible for calls made with your keys. We may enforce rate limits and technical controls to protect the service.
We version the API and aim to avoid breaking changes within a version. We may modify, add, or retire features of the service; where a change materially reduces core functionality you rely on, we will use reasonable efforts to give advance notice through the portal or your account email.
You may not reverse engineer the service, resell raw access to it, or use it to build a service that misrepresents Siglio's role in processing.
Support is provided through the support form on our site and by email replies from our support address. We work to respond quickly, but we do not offer a service level agreement, an uptime commitment, or a guaranteed support response time. The service may be unavailable from time to time, including for maintenance.
Siglio does not currently hold a SOC 2 report, and nothing in the service or its documentation should be read as a representation of any certification we do not state we hold.
You may pause new envelope creation or pause your account from the portal at any time. While an account is fully paused, no new envelopes may be created, API activity and outbound webhook delivery stop, envelopes already in flight remain signable by their recipients, and signing events are captured and queued. On unpause, queued events are delivered in order.
We may pause or suspend the account for uncured payment failure (Section 6), for risk or verification issues (Section 10), or for violation of these Terms. A payment-default pause behaves the same way as a pause you initiate.
Accounts are closed through support, after outstanding billing is settled. Closure disables the account; records are retained as described in the Privacy Policy. Before requesting closure, download any signed documents you need, because Section 7 applies through and after closure.
Sections 4 (for accrued fees), 7, 8, 9, 14, 15, 16, 17, 18, and 20 survive termination.
We own the service, the API, the documentation, and the Siglio brand. We grant you a limited, non-exclusive, non-transferable license to use the API and documentation to build and operate your integration while your account is in good standing.
You own your documents and your data. You grant us the limited rights needed to operate the service: to process, transmit, and display your documents and data to deliver signing workflows you initiate, to route webhooks to you, and to maintain the records described in these Terms and the Privacy Policy. If you send us feedback, we may use it without obligation.
THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE." TO THE MAXIMUM EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT, AND ANY WARRANTY THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, OR SECURE. WE DO NOT WARRANT THAT ANY SIGNATURE OBTAINED THROUGH THE SERVICE WILL BE VALID OR ENFORCEABLE IN ANY PARTICULAR CIRCUMSTANCE.
TO THE MAXIMUM EXTENT PERMITTED BY LAW: (A) NEITHER PARTY IS LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, REVENUE, DATA, OR GOODWILL; (B) OUR TOTAL LIABILITY ARISING OUT OF OR RELATING TO THE SERVICE IS LIMITED TO THE FEES YOU PAID US IN THE TWELVE MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM; AND (C) WE ARE NOT LIABLE FOR LOSS OF, OR INABILITY TO ACCESS, SIGNED DOCUMENTS STORED BY THE SIGNING INFRASTRUCTURE, WHICH IS WHY SECTION 7 REQUIRES YOU TO KEEP YOUR OWN COPY.
These limits do not apply to your payment obligations, your indemnification obligations, or either party's liability that cannot be limited under applicable law. The exclusions in this section apply even if a remedy fails of its essential purpose.
You will defend and indemnify Siglio and CE525B LLC, and their members, managers, and personnel, against third-party claims, and resulting damages, penalties, and reasonable attorneys' fees, arising from: (a) documents and content you process through the service; (b) claims by recipients relating to contact information or consent you supplied or failed to obtain, including claims under the TCPA and analogous state laws; (c) your violation of Section 8, 9, or 10; or (d) your products and services. We will give you prompt notice of any such claim and reasonable cooperation at your expense.
These Terms are governed by the laws of the State of Florida and applicable United States federal law, without regard to conflict-of-laws rules. The exclusive venue for any dispute is the state or federal courts located in Hillsborough County, Florida, and each party consents to personal jurisdiction there. The service is offered from the United States and is directed to users in the United States.
We may update these Terms. For material changes we will give notice through the portal or your account email before the change takes effect. Continued use of the service after the effective date of a change constitutes acceptance. The current version is always available at this page.
Legal notices to Siglio must be sent to: CE525B LLC d/b/a Siglio, 5201 W Kennedy Blvd, Suite 925, Tampa, FL 33609, USA. Operational communications go through the support form. Notices to you may be sent to the email address on your account and are effective when sent.
These Terms, together with the Privacy Policy, are the entire agreement between you and us regarding the service. If any provision is unenforceable, the remainder stands. Our failure to enforce a provision is not a waiver. You may not assign these Terms without our consent; we may assign them in connection with a merger, acquisition, or sale of assets. Neither party is liable for delay or failure caused by events beyond its reasonable control. The parties are independent contractors.