An Oklahoma engineer seal must carry two concentric circles, the legend Licensed Professional Engineer, the state name Oklahoma, your license number and your name as the Certificate of Licensure shows it. The rule names two seal sizes and accepts either one. A rubber stamp qualifies, and so does an electronically produced image. This page covers the wording, the sizes, the signing rule and what to have ready when ordering.
Engineer Seal Stamps compliance desk. Checked against Okla. Admin. Code 245:15-17-1(c) and the State Board of Licensure for Professional Engineers and Land Surveyors. Sources read September 2026. Updated 7 November 2026.
| Requirement | What the rule says | Source |
|---|---|---|
| Wording on the die | Five items: your name in the form the Certificate of Licensure gives it, your license number, the word Oklahoma, the professional legend, and a pair of concentric circles. | Okla. Admin. Code 245:15-17-1(c) |
| The legend | Licensed Professional Engineer. Surveying work takes Licensed Professional Surveyor instead. | Okla. Admin. Code 245:15-17-1(c) |
| Diameter | Two are named and either may be used, one at 1 7/8 inch and one at 1 5/8 inch. | Okla. Admin. Code 245:15-17-1(c); ch. 15, Appendix A |
| Shape | No outline is stated on its own. Two concentric circles sit in the list of required elements, so the design is built from an inner and an outer ring. | Okla. Admin. Code 245:15-17-1(c) |
| Permitted devices | A rubber stamp qualifies. So does electronic digitization, provided the image it puts down comes out accurate and legible. | Okla. Admin. Code 245:15-17-1(b) and 245:15-17-2(b) |
| Image test | The device must mark the face of original documents and of duplications made from them. | Okla. Admin. Code 245:15-17-1(b) and 245:15-17-2(b) |
| Signing and dating | Each time the seal goes down, your signature and the date you signed go beside it or over it. A wet original is not insisted on. | 59 Okla. Stat. § 475.15(C) |
| Sheets that carry the seal | Final engineering and surveying work put in front of a client or a public agency, from plans, drawings and calculations through to design information, reports, surveys, plats and specifications. | Okla. Admin. Code 245:15-17-2(a), (c), (i) |
| Electronic sealing | Allowed. Neither a certificate authority nor a particular technology is named. | Okla. Admin. Code 245:15-17-2(g) |
| Once a license ends | Affixing the seal or signature, or letting someone else affix it, is unlawful after a license has expired or been revoked. Your license number is a personal serial number and it survives renewal. | 59 Okla. Stat. § 475.15(A), (C), (D) |
Licensed in more than one place? Check each jurisdiction in professional engineer seal requirements by state.
What has to appear on an Oklahoma engineer seal?
Five items, all fixed by rule. None of them is a design choice, and a die that omits one is short of what the board asks for.
- Your name, in the form the Certificate of Licensure gives it
- Your license number
- The word Oklahoma
- The words Licensed Professional Engineer
- Two concentric circles
Read the name off the certificate, not from memory. A middle initial that appears on the certificate but not on the order form is the most common reason a die gets cut twice. Land surveyors use the same design with their own legend, since the rule names Licensed Professional Surveyor as well. If you are weighing layouts before you commit, a closer look at choosing an Oklahoma engineer seal is a useful next read.
Which sizes does the rule name?
Two, and either one is compliant. The rule identifies a 1 7/8 inch seal and a 1 5/8 inch seal, with the approved artwork carried in Appendix A to chapter 15 of the board's rules.
Pick between them on the space your sheets leave. The smaller die drops into a crowded title block; the larger one holds the ring lettering at a size that stays readable on large format prints. Both are equally correct, so this is a production decision.
Is a shape prescribed?
Not as a separate instruction. The rule lists two concentric circles among the required elements, which produces a round seal with an inner circle and an outer ring, but it does not state an outline in its own right.
The practical effect is the same. Because the circles are required content, a die that drops one ring to fit longer lettering is missing an element.
Which devices may you use?
A rubber stamp is permissible, and so is electronic digitization, so long as the image it produces is accurate and legible. The rule asks for a device whose image appears both on the original documents and on any duplications made from them.
The rubber stamp is the safe buy. It satisfies the device rule on its face and needs no supporting argument about how an image was generated. An embosser is not among the devices the rule names, so a raised impression on its own does not answer the requirement that an image show up on a duplicate. Readers who want the rules laid out at greater length will find a fuller walk through the Oklahoma PE stamp guidelines covers the same ground with more examples.
How must the signature and date be placed?
Adjacent to the seal or across it, every time the seal is applied. The statute pairs your signature with the date of that signature, which makes a sealed sheet carrying no date incomplete on its face.
The rules stop short of demanding a wet original, so the signature and date can travel with the document in the form the project uses. What they do not allow is a seal standing alone, and the date is the mark most often left off in a hurry.
Which documents have to be sealed?
Final engineering and surveying documents delivered to any public agency or to a client. The list in the rules reaches plans, drawings, calculations, design information, specifications, reports, surveys and plats.
The trigger is delivery of finished work, not the file format. A set that leaves your desk as a deliverable falls inside the rule whether it goes out as paper or as a file. What Oklahoma engineering certification involves gives the wider context for how that work is credentialed in the first place.
Does Oklahoma accept an electronic seal?
Yes. The rules permit the seal to be applied electronically and name neither a certificate authority nor a particular technology. That silence leaves the choice of software and workflow to you.
The bar on the image does not move. The accuracy and legibility test still applies, so an electronic seal that prints soft or breaks up on a copy fails for the same reason a worn rubber die would. How the Oklahoma engineering seal is used day to day goes further into where each format fits.
Can the seal still be used after a license lapses?
It stops being usable. Affixing the seal or the signature to a document after a license has expired or been revoked is unlawful, and so is permitting anyone else to affix them on your behalf.
That second half matters in an office where drawings are produced by a team. The duty sits with the licensee whose name is on the die, which is a reason to keep the stamp under your own control rather than in a shared drawer.
Does renewing a license change your seal?
No. Your license number is your own serial number and it does not change when you renew, so a die that was correct when it was cut stays correct through renewal cycles.
The content that can go out of date is your name, because the rule ties it to the Certificate of Licensure rather than the name you prefer professionally. A certificate reissued in a different name leaves the die out of step with the document it reflects.
What should you have in front of you before ordering?
The legend that fits your practice, your license number, your Certificate of Licensure, and a decision between the two named sizes. Those four inputs determine everything the die will carry.
Check the spelling and the number against the certificate itself, not an old drawing. The steps involved in obtaining a professional engineer stamp in Oklahoma covers what the board issues you before any of this becomes relevant.
How do you check an impression before it goes into service?
Take a test impression on the paper you actually issue on, then read every element against the certificate: name, number, the word Oklahoma, the legend and both circles.
Then photocopy or scan the test sheet and read the copy. The rule cares about what shows on a duplication, so a ring that fills in or lettering that drops out on the copy is worth fixing before the die goes into use.
Frequently asked questions
Are both named sizes equally acceptable?
Yes. The rule names the 1 7/8 inch seal and the 1 5/8 inch seal, and neither is preferred over the other. Choosing between them is a question of the space your title blocks leave.
Is an embosser one of the devices the rule names?
No. The rule names a rubber stamp and electronic digitization, and asks that the image appear on the originals as well as on any duplications. A raised impression alone does not meet that duplication test.
Does a sealed sheet need a date as well as a signature?
Yes. The statute calls for the signature and the date of that signature whenever the seal is applied, placed adjacent to or across the seal.
What legend goes on a surveyor's seal?
Licensed Professional Surveyor. The rule names that wording alongside Licensed Professional Engineer, so the two credentials share a design and differ in the legend.
Can the seal be placed on a PDF instead of stamped in ink?
Yes. Electronic digitization is permissible where the image is accurate and legible, and the rules name no particular technology.
My certificate shows a longer name than I normally use. Which goes on the die?
The name on the Certificate of Licensure. The rule ties the seal to that document, so the die follows the certificate rather than a preferred or shortened form.
Have your Certificate of Licensure open when you order, read the name and number straight off it, and settle on one of the two named sizes before you start. When those details are confirmed, order from the Oklahoma engineer stamps and seals collection.
