Written by Acorn Sales Company, manufacturing stamps and seals since 1964 · Reviewed by Holly R, VP of Sales and Marketing at Acorn Sales, against the Iowa Interior Design Examining Board, within the Iowa Department of Inspections, Appeals, and Licensing and Iowa Code §§ 544C.14, 544C.16 on 21 September 2026 · Updated 21 September 2026
An outside circle of approximately one and three-quarter inches, carrying your name with the words Registered Interior Designer and your Iowa registration number with the word Iowa. Rule 481-1004.1(5)“a”(1) states the size as “An outside circle with a diameter of approximately 1 ¾ inches,” which is the same figure Iowa gives its architects and professional landscape architects. The word to get right is Registered, since Iowa says Licensed Architect and Professional Landscape Architect for the other two.
Iowa works through an information block rather than a bare stamp. Rule 481-1004.1(5)“d” requires a block carrying the application of the seal together with your signature, the date and your registration details, and prints the certification sentence: “I hereby certify that the portion of this technical submission described below was prepared by me or under my direct supervision and responsible charge.” Rule 481-1004.1(5)“e” requires the information in each block to be “typed or legibly printed in permanent ink or a secure electronic signature.”
Watch the placement rule, because it is where a shared drawing set goes wrong. Iowa Code § 544C.14 provides that “The placement of the registered interior designer’s signature and seal shall indicate the document or part thereof for which the seal applies.” On a set where an architect, an engineer and a registered interior designer each seal a portion, a seal placed loosely claims more than you may seal, and the statute separately bars sealing anything outside the scope of registered interior design.
Iowa interior designer seal requirements at a glance
| Requirement | Iowa rule | Source |
|---|---|---|
| Seal required | Yes | Iowa Code §§ 544C.14, 544C.16 |
| Required elements | Your name and the words Registered Interior Designer and Your Iowa registration number and the word Iowa | Iowa Admin. Code r. 481-1004.1(5)“a” |
| Size and shape | An outside circle of approximately one and three-quarter inches. | Iowa Admin. Code r. 481-1004.1(5)“a”(1) |
| Device allowed | “A legible rubber stamp, electronic image or other facsimile of the seal may be used.” Section 544C.14 adds that signatures and seals “may be affixed electronically, scanned, or handwritten,” which is unusually explicit for an interior design statute. | Iowa Admin. Code r. 481-1004.1(5)“c” |
| Signature and date | Iowa works through an information block. | Iowa Admin. Code r. 481-1004.1(5)“d”, “e” |
| What must be sealed | All interior technical submissions issued by the registered interior designer for use in Iowa, and only those within the scope of registered interior design. | Iowa Code §§ 544C.14, 544C.16 |
| Electronic seal | Iowa permits an electronic image of the seal and, by statute, signatures and seals affixed electronically, scanned or handwritten. | Iowa Admin. Code r. 481-1004.1(5)“c”, “e” |
| Renewal and lapse | Registration, renewal, grounds for denial of renewal and reinstatement sit in Iowa Admin. Code ch. 481-1002, rules 481-1002.1 through 481-1002.5, with continuing education at ch. 481-1003 under Iowa Code section 544C.8. | Iowa Admin. Code ch. 481-1002 |
| Firm requirements | Not applicable. | Iowa Code §§ 544C.7, 544C.10 (no firm registration provision) |
| Regulator | The Iowa Interior Design Examining Board, within the Iowa Department of Inspections, Appeals, and Licensing | Iowa Code ch. 544C, principally §§ 544C.7, 544C.8, 544C.9, 544C.10, 544C.14, 544C.15 and 544C.16, read from the Iowa Legislature’s published code |
Is a seal required in Iowa?
Iowa is a registration state that nonetheless gives its interior designers a full sealing regime. Iowa Code section 544C.14 requires a registered interior designer to have “a seal with which to identify all interior technical submissions issued by the registered interior designer for use in this state,” with the design prescribed by the board, and limits signing and sealing to submissions “within the scope of registered interior design.” Interior technical submissions prepared by or under the designer’s direct supervision and responsible charge must be stamped with the impression of the seal. Section 544C.16 completes the picture: a political subdivision must accept submissions bearing “the seal or stamp of a registered interior designer consistent with the provisions of section 544C.14.”
What must appear on the seal
- Your name and the words Registered Interior Designer
- Your Iowa registration number and the word Iowa
Rule 481-1004.1(5)“a” pairs the items the same way the Iowa architect rule does: the name with the words Registered Interior Designer, and the Iowa registration number with the word Iowa. Iowa says Registered Interior Designer, where it says Licensed Architect and Professional Landscape Architect. No expiry date belongs on the face; Iowa puts the certification wording and the surrounding detail in an information block on the submission. No firm name is contemplated.
Size and shape
An outside circle of approximately one and three-quarter inches. Rule 481-1004.1(5)“a”(1) states it as “An outside circle with a diameter of approximately 1 ¾ inches.” That is the same figure Iowa gives its architects at rule 481-1064.1(7) and its professional landscape architects at rule 481-1084.1(7). Iowa engineers and land surveyors have no stated dimension.
Embosser, rubber stamp or digital
“A legible rubber stamp, electronic image or other facsimile of the seal may be used.” Section 544C.14 adds that signatures and seals “may be affixed electronically, scanned, or handwritten,” which is unusually explicit for an interior design statute. The safe buy is a rubber stamp at approximately 1 3/4 inches, with a matching electronic image for drawing sets.
Signing and dating
Iowa works through an information block. Rule 481-1004.1(5)“d” requires the block to carry the application of the seal together with the signature, the date and the registration details, and prints the certification sentence: “I hereby certify that the portion of this technical submission described below was prepared by me or under my direct supervision and responsible charge.” Rule 481-1004.1(5)“e” requires the information in each block to be “typed or legibly printed in permanent ink or a secure electronic signature.” Section 544C.14 adds a placement rule that matters on a shared drawing: “The placement of the registered interior designer’s signature and seal shall indicate the document or part thereof for which the seal applies.”
A registration title with a real seal, and a conflict-of-interest duty in the same section
Iowa registers rather than licenses interior designers, and then gives them almost the full apparatus of a sealing profession: a board-prescribed seal, a 1 3/4 inch outside circle, an information block with prescribed certification wording, prima facie evidence effect, and a statutory obligation on political subdivisions to accept the sealed submission under section 544C.16. That combination is rare in registration states.
Which documents must be sealed
All interior technical submissions issued by the registered interior designer for use in Iowa, and only those within the scope of registered interior design. Section 544C.14 bars a designer from sealing work the designer did not author or directly supervise, and from affixing registration information to submissions the designer is not competent to perform. Section 544C.16 permits a designer to sign and seal required interior technical submissions for projects kept as public records and requires political subdivisions to accept them. Rule 481-1004.1(5)“h” makes the seal prima facie evidence that the submission was prepared by or under the responsible charge of the individual named on it.
Electronic and digital seals
Iowa permits an electronic image of the seal and, by statute, signatures and seals affixed electronically, scanned or handwritten. The rule requires that block information be typed or legibly printed in permanent ink or carry a secure electronic signature. No certificate authority, cryptographic standard or verification service is named in rule 481-1004.1, and the rule does not cross-reference Iowa Code chapter 554D the way the engineering and land surveying rule at 481-1050.1(8) does. Treat the security procedure as the designer’s responsibility.
Renewal, lapse and retirement
Registration, renewal, grounds for denial of renewal and reinstatement sit in Iowa Admin. Code ch. 481-1002, rules 481-1002.1 through 481-1002.5, with continuing education at ch. 481-1003 under Iowa Code section 544C.8. Rule 481-1004.1(5)“g” is the sentence that reaches the device: “A registered interior designer is responsible for the custody and proper use of the seal. Improper use of the seal may be grounds for disciplinary action.” Iowa Code section 544C.15 makes it an offence, punishable as a simple misdemeanour, intentionally to affix another person’s signature or seal, to use another’s registration without permission, to impersonate a designer, to obtain registration fraudulently or to make a false oath. Not addressed: whether the registration number changes on reinstatement and whether the device must be surrendered.
Firm requirements
Not applicable. Iowa registers individuals under chapter 544C and issues no interior design firm registration, certificate of authorization or firm seal. Section 544C.10 polices the title rather than the entity, making unlawful use of the title registered interior designer an offence.
What to check before you order
Order a circular device with an outside circle of approximately one and three-quarter inches, carrying your name with the words Registered Interior Designer and your Iowa registration number with the word Iowa. A legible rubber stamp, an electronic image or another facsimile may be used, and the statute allows a signature and seal to be affixed electronically, scanned or handwritten. Iowa works by information block: put a block on the submission carrying the seal, your signature, the date and your registration details, with the prescribed certification sentence, and type or legibly print the rest in permanent ink. Place the signature and seal so that they show which document or which part of it your seal covers, and seal nothing outside the scope of registered interior design.
Browse interior designer stamps and seals.
Frequently asked questions
Is a seal required for an Iowa registered interior designer?
Yes. Iowa Code § 544C.14 requires a registered interior designer to have “a seal with which to identify all interior technical submissions issued by the registered interior designer for use in this state,” with the design prescribed by the board, and requires interior technical submissions prepared by or under your direct supervision and responsible charge to be stamped with the impression of the seal.
What goes on an Iowa interior designer seal?
Two paired items under rule 481-1004.1(5)“a”: your name with the words Registered Interior Designer, and your Iowa registration number with the word Iowa. No expiry date belongs on the face, since Iowa puts the certification wording and the surrounding detail in the information block on the submission, and no firm name is contemplated.
What size is the Iowa interior designer seal?
An outside circle of approximately one and three-quarter inches, under rule 481-1004.1(5)“a”(1). Iowa applies the same figure to architects at rule 481-1064.1(7) and to professional landscape architects at rule 481-1084.1(7), while Iowa engineers and land surveyors have no stated dimension.
Rubber stamp or electronic image in Iowa?
Either, and more. Rule 481-1004.1(5)“c” provides that “A legible rubber stamp, electronic image or other facsimile of the seal may be used,” and Iowa Code § 544C.14 adds that signatures and seals “may be affixed electronically, scanned, or handwritten,” which is unusually explicit for an interior design statute. A rubber stamp at approximately 1-3/4 inches with a matching electronic image covers both routes.
What is the Iowa information block?
A block on the submission carrying the seal, your signature, the date and your registration details, with the certification sentence at rule 481-1004.1(5)“d”. The information in each block has to be typed or legibly printed in permanent ink or carry a secure electronic signature, so buy ruled lines rather than engraving the content.
Do Iowa cities have to accept my seal?
Yes. Iowa Code § 544C.16 provides that a political subdivision must accept submissions bearing “the seal or stamp of a registered interior designer consistent with the provisions of section 544C.14,” and permits a designer to sign and seal required interior technical submissions for projects kept as public records.
What can an Iowa registered interior designer seal?
All interior technical submissions issued for use in Iowa, and only those within the scope of registered interior design. Section 544C.14 bars sealing work you did not author or directly supervise, and bars affixing registration information to submissions you are not competent to perform. Rule 481-1004.1(5)“h” makes the seal prima facie evidence that the submission was prepared by or under the responsible charge of the individual named on it, which is why the scope limit matters.
Can I seal Iowa submissions electronically?
Yes. Iowa permits an electronic image of the seal and, by statute, signatures and seals affixed electronically, scanned or handwritten, with the block requirement that information be typed or legibly printed in permanent ink or carry a secure electronic signature. No certificate authority, cryptographic standard or verification service is named in rule 481-1004.1, and the rule does not cross-reference Iowa Code chapter 554D the way the engineering and land surveying rule at 481-1050.1(8) does, so the security procedure is your responsibility.
What are the Iowa offences around misuse of a seal?
Iowa Code § 544C.15 makes it an offence, punishable as a simple misdemeanour, intentionally to affix another person’s signature or seal, to use another’s registration without permission, to impersonate a designer, to obtain registration fraudulently or to make a false oath. The same section also requires designers to avoid conflicts of interest, to inform a client immediately of circumstances that could interfere with professional obligations, and to withdraw when necessary, which is unusual for a section headed around stamps and seals.
Who is responsible for custody of an Iowa seal?
You are. Rule 481-1004.1(5)“g” provides that “A registered interior designer is responsible for the custody and proper use of the seal. Improper use of the seal may be grounds for disciplinary action.”
What happens if my Iowa registration lapses?
Registration, renewal, grounds for denial of renewal and reinstatement sit in Iowa Admin. Code ch. 481-1002, rules 481-1002.1 through 481-1002.5, with continuing education at ch. 481-1003 under Iowa Code § 544C.8. Whether the registration number changes on reinstatement, and whether the device must be surrendered, the rules do not say.
Does an Iowa interior design firm register?
No. Iowa registers individuals under chapter 544C and issues no interior design firm registration, certificate of authorization or firm seal. Section 544C.10 polices the title rather than the entity, making unlawful use of the title registered interior designer an offence.
