National Association of Tax Professionals, Inc

natptax.org · US · Issued by DigiCert

Professional association for tax professionals and accountants

★★★ 5/10Professional ServicesEstablished industry organization, recognized within tax profession, regional influence

PrecertExpires in 6 monthsVMCRegisteredView Final CertASN.1 crt.sh crt.sh Final

Certificate Summary

Fingerprint (SHA-256)35e004e95bcf16e2790e6048df83dcaefa2aeb85d6960470ccac98543645d529

Serial Number0a:f0:f3:13:ff:c3:30:62:86:f4:55:24:71:74:dc:3c

Issued2026-03-12

Expires2026-09-26

Intermediate CADigiCert

SubjectNational Association of Tax Professionals, Inc, US

SANsnatptax.org · 3 certs,natptax.com · 3 certs

CT LogGorgon (DigiCert) #32707 · 2026-03-12 04:57 UTC (4 days ago)

Certificate Lint

3 errors21 passed

3 errors1 notice21 passed

MCR (Mark Certificate Requirements)3 fails

✓

EKU must contain BIMI OIDMCR §7.1.2.7 ↗

e_bimi_eku_present

✓

EKU must contain only BIMI OIDMCR §7.1.2.7 ↗

e_bimi_eku_single

✓

Name Constraints must not be presentMCR §7.1.2.7 ↗

e_bimi_no_name_constraints

✗

Key Usage must include digitalSignatureerrorMCR §7.1.2.7 ↗

Key Usage extension is missing

e_bimi_key_usage

✓

Validity period must not exceed 825 daysMCR §6.3.2 ↗

e_bimi_validity_period

✗

SCT List extension must be presenterrorMCR §7.1.2.7 ↗

SCT List extension is missing

e_bimi_sct_present

✓

Pilot ID extension must not be presentMCR §7.1.2.7 ↗

e_bimi_pilot_id_absent

✓

BIMI General Policy OID must be presentMCR §7.1.6.4 ↗

e_bimi_general_policy

✓

CPS URL must be present in certificate policiesMCR §7.1.6.4 ↗

e_bimi_cps_url_present

✓

Mark type must be present and validMCR §7.1.4.2.2 ↗

e_bimi_mark_type_valid

✗

Trademark Office must be present for Registered MarkerrorMCR §7.1.4.2 ↗

Missing Trademark Office (OID 1.3.6.1.4.1.53087.1.2) in subject DN

e_bimi_mark_type_dn_trademark_office

✓

Trademark Country must be present for Registered MarkMCR §7.1.4.2 ↗

e_bimi_mark_type_dn_trademark_country

✓

Trademark Registration ID must be present for Registered MarkMCR §7.1.4.2 ↗

e_bimi_mark_type_dn_trademark_registration_id

✓

Logotype extension must be presentMCR §7.1.2.7 ↗

e_bimi_logotype_present

✓

Logotype must contain data: URIMCR §7.1.2.7 ↗

e_bimi_logotype_data_uri

✓

SVG must be gzip-compressedMCR §7.1.2.7 ↗

e_bimi_svg_compressed

✓

SVG must conform to SVG Tiny PSMCR §7.1.2.7 ↗

e_bimi_svg_tiny_ps

✓

RSA key must be at least 2048 bitsMCR §6.1.5 ↗

w_bimi_rsa_key_size

—

ECDSA key must use P-256 or P-384MCR §6.1.5 ↗

w_bimi_ecdsa_curve

✓

Signature hash should be SHA-256 or strongerMCR §6.1.5 ↗

w_bimi_sig_hash

RFC 5280 (X.509)

✓

Certificate must not be a CARFC 5280 §4.2.1.9 ↗

e_bimi_basic_constraints

—

Key Usage extension must be criticalRFC 5280 §4.2.1.3 ↗

e_bimi_key_usage_critical

CA/Browser Forum

✓

Serial number should contain at least 64 bits of entropyCABF ↗

w_bimi_serial_entropy

✓

CA-specific policy OID should be presentCABF ↗

Found DigiCert policy OID: 2.16.840.1.114412.0.2.5

w_bimi_ca_policy_oid

RFC 3709 (Logotype)1 fail

✓

Logotype extension must not be criticalRFC 3709 §2.1 ↗

e_bimi_logotype_not_critical

✓

Logotype must contain a hashRFC 3709 §2.1 ↗

e_bimi_logotype_hash_present

✗

Logotype hash should use SHA-256noticeRFC 3709 §2.1 ↗

Logotype uses SHA-1 hash; SHA-256 recommended for stronger integrity

n_bimi_logotype_hash_sha256

Embedded Logo

SVG Hash6874ed80da57a061fc767a037658febb192db7b20dc9e50375da3a6355140152

Revocation Status

No OCSP or CRL endpoints found in this certificate's extensions.

Certificate Details

Serial Number: 0a:f0:f3:13:ff:c3:30:62:86:f4:55:24:71:74:dc:3c

Issuer:

commonName: DigiCert Verified Mark RSA4096 SHA256 2021 CA1

organizationName: DigiCert

Validity:

Not Before: Thu, 12 Mar 2026 00:00:00 UTC

Not After: Sat, 26 Sep 2026 23:59:59 UTC

Subject:

commonName: National Association of Tax Professionals, Inc

organizationName: National Association of Tax Professionals, Inc

countryName: US

stateOrProvinceName: Wisconsin

localityName: Appleton

BIMI Trademark Country: US

BIMI Trademark ID: 1430231

BIMI Mark Type: Registered Mark

Jurisdiction State: Wisconsin

Jurisdiction Country: US

Business Category: Private Organization

Serial Number: 6N08130

Street Address: 3517 N McCarthy Rd

Subject Alternative Names:

DNS:natptax.org· 3 certs

DNS:natptax.com· 3 certs

X509v3 Extensions:

Subject Key Identifier(2.5.29.14):30:8A:BA:09:70:7F:A7:12:91:56:E4:7E:B2:16:2D:0A:25:7E:C9:25

Subject Alternative Name(2.5.29.17):natptax.org, natptax.com

Basic Constraints(2.5.29.19):CriticalCA: false

CRL Distribution Points(2.5.29.31):http://crl3.digicert.com/DigiCertVerifiedMarkRSA4096SHA2562021CA1.crl http://crl4.digicert.com/DigiCertVerifiedMarkRSA4096SHA2562021CA1.crl

Certificate Policies(2.5.29.32):DigiCert VMC Policy http://www.digicert.com/CPS BIMI Mark Certificate General Policy

Authority Key Identifier(2.5.29.35):BE:9F:BD:8D:57:6D:95:B5:AD:63:C3:97:4E:AB:A8:84:5D:3A:07:F5

Extended Key Usage(2.5.29.37):Brand Indicator for Message Identification (BIMI)

Authority Information Access(1.3.6.1.5.5.7.1.1):CA Issuers: http://cacerts.digicert.com/DigiCertVerifiedMarkRSA4096SHA2562021CA1.crt

Logotype (BIMI)(1.3.6.1.5.5.7.1.12):Embedded SVG logotype (see Logo section)

CT Precert Poison(1.3.6.1.4.1.11129.2.4.3):CriticalPrecertificate poison (critical)

ASN.1 Structure

Certificate Chain

Leaf CertificateNational Association of Tax Professionals, Inc

Position 0

Subject: 1.3.6.1.4.1.311.60.2.1.3=US, 1.3.6.1.4.1.311.60.2.1.2=Wisconsin, 2.5.4.15=Private Organization, 2.5.4.5=6N08130, C=US, ST=Wisconsin, L=Appleton, 2.5.4.9=3517 N McCarthy Rd, O=National Association of Tax Professionals\, Inc, CN=National Association of Tax Professionals\, Inc, 1.3.6.1.4.1.53087.1.13=Registered Mark, 1.3.6.1.4.1.53087.1.3=US, 1.3.6.1.4.1.53087.1.4=1430231

Issuer: C=US, O=DigiCert\, Inc., CN=DigiCert Verified Mark RSA4096 SHA256 2021 CA1

Serial: 0a:f0:f3:13:ff:c3:30:62:86:f4:55:24:71:74:dc:3c

SHA-256: 35e004e95bcf16e2...3645d529

2026-03-12 – 2026-09-26

Intermediate CADigiCert, Inc.

Position 1

Subject: C=US, O=DigiCert\, Inc., CN=DigiCert Verified Mark RSA4096 SHA256 2021 CA1

Issuer: C=US, ST=Utah, L=Lehi, O=DigiCert\, Inc., OU=www.digicert.com, CN=DigiCert Verified Mark Root CA

Serial: 0c:5b:6f:7e:eb:b3:f1:c2:ac:dd:a1:3a:98:9d:bd:82

SHA-256: 0f2024a1f5ab051c...361b930a

2021-07-01 – 2036-06-30

Root CADigiCert, Inc.

Position 2

Subject: C=US, ST=Utah, L=Lehi, O=DigiCert\, Inc., OU=www.digicert.com, CN=DigiCert Verified Mark Root CA

Issuer: C=US, ST=Utah, L=Lehi, O=DigiCert\, Inc., OU=www.digicert.com, CN=DigiCert Verified Mark Root CA

Serial: 06:c1:67:cf:eb:f4:8d:35:d6:24:10:18:5e:11:c5:eb

SHA-256: 504386c9ee8932fe...33c46b42

2019-09-23 – 2049-09-23

Raw PEM