Company: DLX
Filing Date: 2025-04-24
Form Type: S-3ASR
Source: 0001104659-25-038372
Chunk: 1

Company: DELUXE CORP
Filing Date: 2025-04-24
Form: S-3ASR
Chunk 1
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 Rule 462(e) under the Securities Act, check the following box. ☒ If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐ Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| ​ | Large accelerated filer 
 ☒                       
 ​                       | ​ | ​ | Accelerated filer         
 ☐                         
 ​                         | ​ |
| ​ | Non-accelerated filer   
 ☐                       
 ​                       | ​ | ​ | Smaller reporting company 
 ☐                         
 ​                         | ​ |
| ​ | ​                       | ​ | ​ | Emerging growth company   
 ☐                         
 ​                         | ​ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

TABLE OF CONTENTS

### PROSPECTUS

### DELUXE CORPORATION

### COMMON STOCKDEBT SECURITIESGUARANTEES OF DEBT SECURITIESWARRANTSUNITSRIGHTS
**We may offer and sell, from time to time, one or any combination of the securities we describe in this prospectus. This prospectus describes some of the general terms that may apply to these securities and the general manner in which they may be offered. When we offer securities, we will provide you with a prospectus supplement describing the terms of the specific issue of securities including the offering price of the securities. The prospectus supplement may also add, update or change information contained in this prospectus. In addition, we may supplement, update or change any of the information contained in this prospectus by incorporating information by reference in this prospectus.

You should read this prospectus and any prospectus supplement relating to a specific issue of securities, as well as any information described under the heading “Where You Can Find More Information,” carefully before you invest. This prospectus is not an offer to sell