Here are a few options for the description of the WordPress post_tag “合法憑證” (Hé Fǎ Píng Zhèng) in Traditional Chinese, along with explanations to help you choose the best fit:

**Option 1: Concise and Direct**

* **Description:** 符合法律效力的文件、證明或授權。
* **Translation:** Documents, certifications, or authorizations that comply with the force of law.
* **Use Case:** Best for broad application, when you want to quickly convey the core meaning.

**Option 2: Emphasizing Verification and Security**

* **Description:** 經查核且確保真實性的合法文件，可用於身份驗證、權利證明及其他法律相關用途。
* **Translation:** Legitimate documents that have been checked and ensure authenticity, usable for identity verification, proof of rights, and other legal-related purposes.
* **Use Case:** Good if your content deals with security, authentication, or the potential for fraudulent documents.

**Option 3: Highlighting Common Examples**

* **Description:** 各種法律文件，例如：身份證、合約、許可證、或其他官方核發的證明文件。
* **Translation:** Various legal documents, such as ID cards, contracts, licenses, or other official certificates.
* **Use Case:** Useful if you will be using the tag on posts about specific kinds of documents (e.g., you have posts on different types of licenses).

**Option 4: User-Friendly and Explanatory**

* **Description:** 標示文件或其他資料具有法律效力，經過認證，且在法律上有效。 涵蓋的範圍可能包括合同、身分證明、專業資格等。
* **Translation:** Marking documents or other materials as having legal force, being certified, and being legally effective. The scope covered might include contracts, identity documents, professional qualifications, and so on.
* **Use Case:** Helpful if your content is intended for a general audience who might not be familiar with legal jargon.

**Key Considerations when choosing:**

* **Context of your website:** What is your website’s overall focus? (e.g., legal services, business, general information)
* **Target audience:** Who are you writing for? (Consider their legal knowledge and level of understanding.)
* **Type of content associated with the tag:** what content will be tagged with “合法憑證”?

I recommend looking at your existing content and choosing the description that best represents the type of information you present. If you’re unsure, the concise option (Option 1) is a safe and effective starting point. You can always modify it later. Good Luck!