SSL Certificate Types Explained: DV vs OV vs EV, Wildcard and Multi-Domain

All SSL certificates encrypt traffic with the same strength. The types differ in two things only: how much the certificate authority checked before issuing it (DV checks domain control, OV checks that your organization legally exists, EV adds stricter identity vetting) and which names it covers (one domain, all subdomains with a wildcard, or several domains with a multi-domain certificate). For most websites, a free DV certificate is enough; OV or EV make sense when a verified company identity is a requirement.

What an SSL/TLS certificate actually does

"SSL" is the old name; today's connections use TLS 1.2 or 1.3, but everyone still says SSL. A certificate does three jobs:

• Encryption: nobody between the visitor and your server (public Wi-Fi, an ISP, a compromised router) can read passwords, form data or card details.

• Integrity: nobody can inject ads or scripts into your pages in transit.

• Authentication: the browser confirms it is talking to the real example.com, because a trusted certificate authority (CA) signed a certificate for that name.

Without it, browsers label your site "Not secure", especially on pages with forms. HTTPS is also a lightweight Google ranking signal and a requirement for HTTP/2 and HTTP/3 in browsers, which load pages faster.

Validation levels: DV vs OV vs EV

DV: Domain Validation

The CA checks one thing: that you control the domain. It does this automatically by asking you to place a file on the site, add a DNS record, or answer an email sent to an address like admin@ the domain. Issuance takes minutes. Free certificates from Let's Encrypt and the AutoSSL certificates issued by cPanel hosts are DV.

What it proves: the connection is encrypted to whoever controls this domain. It says nothing about who that is.

OV: Organization Validation

The CA verifies that your organization is a real, registered entity, usually through official business records and a verification call. The certificate then contains your legal company name, city and country, visible to anyone who opens the certificate details. As a rule of thumb, expect one to three business days if your documents are in order.

What it proves: the domain belongs to a specific, verified legal entity.

EV: Extended Validation

EV follows the strictest public vetting rules: legal, physical and operational existence of the company, plus confirmation that the person requesting it is authorized. It can take several days to a couple of weeks.

An important update many articles still miss: major browsers removed the green address bar with the company name around 2019. Today, a DV, OV and EV certificate all show the same padlock. The verified company name is still inside the certificate details, and some banks, payment providers and enterprise procurement teams still require EV or OV, but EV no longer changes what an ordinary visitor sees.

Coverage: single, wildcard and multi-domain

• Single-domain: covers one name, and most CAs include both example.com and www.example.com. Fine for a typical company site.

• Wildcard: covers *.example.com, meaning any first-level subdomain: shop.example.com, mail.example.com, app.example.com. It does not cover a second level such as api.eu.example.com. Useful when you keep adding subdomains or run a SaaS with a subdomain per customer. Wildcard DV certificates require DNS validation.

• Multi-domain (SAN): lists several different names in one certificate, for example example.com, example.net and example.com.eg. Handy for a company with several brands on one server.

Wildcards exist at DV and OV level. Industry rules do not allow EV wildcards, so an EV certificate must name each host explicitly.

Certificate lifetime is getting shorter

Public certificates used to last up to 398 days. Under rules adopted by the CA/Browser Forum, the maximum dropped to 200 days in March 2026, and it is scheduled to fall to 100 days in 2027 and 47 days in 2029. Free certificates already renew automatically every few weeks or months. The practical lesson: even if you buy a paid certificate for a year or more, it will be reissued during that term, so make sure renewal and installation are automated or that someone owns the reminder.

When the free certificate is enough

For blogs, company websites, portfolios, booking sites and most online stores, a free DV certificate is enough. Payment card data is normally entered on the payment gateway's page or in its secure form, and the gateway's own certificate protects that step. Card-industry rules require strong encryption, not OV or EV. If your host includes free SSL, as all shared hosting plans with free SSL and automatic renewal do, you already have the same encryption as a bank. We explain the reasoning in more detail in why free SSL on every hosting plan matters for MENA websites.

When OV or EV makes sense

• A contract or tender requires it: some government, banking and enterprise clients ask suppliers for OV or EV on portals and APIs.

• Login portals that attract phishing: a verified organization name in the certificate gives security-aware users and auditors something to check.

• B2B trust: companies that sell to other companies often want the legal name attached to their domain.

• Security questionnaires: some partner audits ask for organization-validated certificates on customer-facing systems.

If one does, you can choose between paid DV wildcard, OV (Premium SSL and wildcard) and EV certificates based on what the requirement names. If none apply, paying for EV buys paperwork, not extra protection.

How to install a certificate

On cPanel hosting

Free certificates are issued automatically once the domain points to the server; check SSL/TLS Status and click Run AutoSSL if one is missing. For a paid certificate:

1. Generate a CSR in SSL/TLS → Certificate Signing Requests. cPanel creates the private key and keeps it on the server.

2. Send the CSR to the CA and complete validation (DNS record, file or email for DV; documents for OV/EV).

3. Paste the issued certificate and the CA bundle in SSL/TLS → Manage SSL Sites.

On a VPS with Nginx

For a free certificate on Ubuntu or Debian, use Certbot. Replace the domain with yours:

sudo apt install certbot python3-certbot-nginx
sudo certbot --nginx -d example.com -d www.example.com
sudo certbot renew --dry-run

For a paid certificate, create the key and CSR with OpenSSL, then submit the CSR to the CA:

openssl req -new -newkey rsa:2048 -nodes -keyout example.com.key -out example.com.csr

Keep the .key file private and never send it to anyone, including the CA.

Force HTTPS and fix mixed content

Installing a certificate does not redirect visitors. On cPanel, turn on Force HTTPS Redirect in Domains, or add this to the top of .htaccess:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Mixed content happens when an HTTPS page loads images, scripts or fonts over http://. Browsers block or warn, and the padlock disappears. Open the browser console (F12) to see which files are affected. In WordPress, set both site addresses to https and replace old URLs in the database:

wp search-replace 'http://example.com' 'https://example.com' --skip-columns=guid

Take a database backup first. Our guide to installing WordPress on cPanel shows how to start on HTTPS from day one so this step is never needed.

Check your certificate and fix common errors

This command shows the issuer, the names and the expiry date for any site:

echo | openssl s_client -connect example.com:443 -servername example.com 2>/dev/null | openssl x509 -noout -subject -issuer -dates

• Name mismatch (ERR_CERT_COMMON_NAME_INVALID): the certificate does not cover the exact hostname, often www or a new subdomain.

• Expired certificate: automatic renewal failed, usually because DNS moved or validation files are blocked.

• Incomplete chain: the intermediate certificate (CA bundle) is missing. Desktop Chrome may still work while some phones and API clients fail.

Frequently asked questions

Does an EV or OV certificate improve SEO?

No. Google treats any valid HTTPS the same way. The ranking benefit comes from having HTTPS, not from the validation level.

Is a free SSL certificate safe?

Yes. Free DV certificates use the same encryption as paid ones. The difference is identity verification and, with paid certificates, vendor support and warranty terms.

Do I need a wildcard SSL certificate?

Only if you run several subdomains, or add them often. With two or three fixed subdomains, separate free certificates or one multi-domain certificate work just as well.

What is the difference between SSL and TLS?

TLS is the modern successor of SSL. All SSL versions are obsolete and disabled; the certificates sold as "SSL certificates" are used with TLS.

How long does it take to get an SSL certificate?

DV: minutes. OV: typically one to three business days. EV: several days or longer, depending on how quickly your company documents can be verified.

Every IM HOST hosting plan includes free SSL. If you need a DV wildcard, an OV certificate for your company or EV, see the options on our SSL certificates page, and our engineers can help with the CSR and installation.