Oasis Engineering adds browser-based verification for manufactured home foundation letters

Oasis Engineering has added a browser-based authenticity check to its manufactured home foundation certification letters, letting lenders and underwriters confirm in seconds whether a sealed PDF matches the engineer’s original file. The change targets loan-closing risk for FHA, VA, USDA and many conventional manufactured home loans.

Why it matters: - Lenders and underwriters can now verify a foundation certification letter’s authenticity without uploading a file or creating an account. - The check is designed to reduce document tampering risk on manufactured home loans, where these certifications are often required before closing. - The verification process runs locally in the browser, so nothing leaves the user’s computer.

What happened: - Oasis Engineering said every manufactured home foundation certification issued through its engineerletters.co platform now includes a digital seal with a public verification record. - Anyone with a copy of the letter can open its verification page, drop in the PDF and see whether the file matches the one the engineer sealed. - The announcement was made Sept. 28, 2026, in Tampa, Florida.

The details: - Foundation certifications are required on most FHA, VA and USDA loans for manufactured homes, and on many conventional loans, before closing. - The platform records a SHA-256 cryptographic fingerprint of the final PDF when a letter is sealed. - The record also stores the reference number, property, date and engineer of record. - Each letter links to its own verification page. - The recipient drags the PDF onto the page, and the browser computes the file fingerprint locally and compares it to the stored record. - A match confirms the file is the one the engineer sealed. - A mismatch indicates the file has been altered or re-saved, and the recipient should request the original. - Verification records are permanent and do not expire with the engagement. - The service is offered in 39 states at $450. - If the available evidence is not enough to complete the engineering review, Oasis Engineering refunds the fee in full.

Between the lines: - The new workflow shifts document review from trust-based review to file-level verification. - That could matter most for lenders handling letters that arrive from borrowers, sellers or third parties, where the original issuing engineer may be hard to confirm. - The browser-only design also removes a common friction point in compliance workflows: file upload.

What's next: - Oasis Engineering says details, a sample letter and the review methodology are available at the service website. - The company will continue offering remote, evidence-based engineering letters through its engineerletters.co platform for manufactured home foundation certifications, permit closeouts and verification of completed work.

The bottom line: - Oasis Engineering is trying to make sealed engineering letters independently checkable in seconds, which could streamline manufactured home loan underwriting while reducing the risk of altered documents.