Mailing Important Documents – Secure Shipping Guide

Mailing important documents from St. Thomas—whether locally, to the mainland U.S., or internationally—requires more than just an envelope and a stamp. Documents like legal contracts, immigration papers, tax filings, business records, or college applications often require secure handling, time-sensitive delivery, and proof of receipt.

At Mail Plus, we specialize in helping residents, businesses, and travelers ship time-critical documents with confidence using trusted carriers such as USPS, FedEx, and DHL. This guide explains everything you need to know before you drop your paperwork in the mail.

What Counts as “Important” Documents?

Important documents often include legal, financial, or personal records that must be delivered intact and on time. Some common examples include:

Passports or copies of ID
Marriage, birth, or death certificates
Immigration paperwork or visa applications
College application packets
Real estate closing documents
Tax returns or IRS correspondence
Business contracts
Medical records or prescriptions
Insurance claim documentation

Mailing these types of documents from the U.S. Virgin Islands requires careful preparation to ensure they reach their destination safely.

Step 1: Choose the Right Envelope or Packaging

Unlike mailing packages, sending documents usually involves flat, lightweight materials. However, choosing the right envelope is still crucial.

Recommended options:

Rigid mailers – Protect documents from bending during transit
Padded envelopes – Offer extra cushioning for sensitive items
Tyvek envelopes – Durable and resistant to tearing
Flat-rate legal envelopes – Available through USPS and FedEx for easy pricing

Avoid standard paper envelopes if your document is sensitive or time-sensitive. At Mail Plus, we provide a range of secure document mailers designed specifically for important paperwork.

Step 2: Select the Right Carrier and Delivery Service

Not all mailing services are created equal—especially when it comes to speed, reliability, and proof of delivery.

Here’s how the main carriers compare for document mailing from St. Thomas:

USPS (United States Postal Service)
Best for: Budget-conscious domestic deliveries
Services:

Priority Mail Flat Rate Envelope (2–5 days)
Priority Mail Express (1–2 days, includes tracking and insurance)
Certified Mail or Return Receipt (for legal documents)

Limitations: Slower than private carriers for mainland delivery, limited tracking for international shipments.

FedEx
Best for: Time-sensitive or high-value documents
Services:

FedEx Express Saver (3 days)
FedEx 2Day or Overnight
FedEx Envelope with tracking, signature confirmation, and insurance

FedEx offers real-time tracking and higher reliability for urgent or business-related documents. Mail Plus is an authorized FedEx ShipCenter and can assist with document drop-off, labeling, and delivery estimates.

DHL
Best for: International document delivery
Services:

DHL Express Worldwide (1–4 days globally)
Proof of delivery, detailed tracking, and customs support

DHL is ideal for documents being sent to Canada, Europe, Asia, or South America. Mail Plus can provide you with packaging, labels, and help with international paperwork.

Step 3: Consider Delivery Speed and Deadline Requirements

Documents often come with deadlines—IRS filings, college admissions, or visa applications must arrive by specific dates. Choosing the right delivery service depends on how quickly you need the document delivered.

Delivery estimates from St. Thomas:

Carrier	Service	Mainland U.S. Delivery	International Delivery
USPS	Priority Mail	3–5 days	Varies (7–14+ days)
USPS	Priority Mail Express	1–2 days	Limited availability
FedEx	2Day / Overnight	1–2 days	2–5 days
DHL	Express Worldwide	N/A	1–4 days

Mail Plus staff can help you determine which service best matches your timeframe and budget.

Step 4: Use Tracking, Insurance, and Delivery Confirmation

When mailing important documents, don’t skip the optional services. A few extra dollars can protect you from stress or loss down the line.

Recommended add-ons:

Tracking – Monitor your document’s journey online
Insurance – Covers lost or damaged items (ask about coverage for original documents)
Signature confirmation – Ensures delivery is made to the correct person
Certified mail – Available through USPS for legal proof of mailing and delivery

We highly recommend choosing a service that includes tracking and delivery confirmation, especially for documents that may be legally or financially significant.

Step 5: Know the Rules for International Document Mailing

Sending documents internationally involves extra steps and sometimes customs paperwork—even if the contents are simply paper.

Tips for smooth international delivery:

Clearly label the envelope with a full destination address (no abbreviations)
Include a return address in case of delivery issues
Confirm the document type is allowed by the destination country
Include a customs declaration if required (Mail Plus can assist)

Some countries restrict the mailing of official documents or require secure courier services. DHL and FedEx offer secure international channels and customs clearance support.

Additional Tips for Mailing Important Documents

Always make a copy of the document before mailing, especially if it's original.
Consider scanning the document and emailing a copy before mailing.
Use water-resistant packaging to protect against weather during transport.
Write addresses clearly and in all capital letters.
Keep your receipt and tracking number in a safe place.

Mail Plus can assist you with document copies, scanning, and secure packaging for official use.

FAQs

Can I send original documents through the mail from St. Thomas?
Yes, but it’s best to use a trackable and insured service like FedEx or USPS Certified Mail. You may also want to make a copy before sending.

What’s the safest way to mail legal or financial paperwork?
Use a rigid mailer or flat-rate legal envelope with tracking, delivery confirmation, and optional insurance. FedEx and DHL are preferred for high-priority or international documents.

Can I get proof that my document was delivered?
Yes. Services like FedEx Express and USPS Certified Mail provide confirmation. We can also request signature delivery for extra security.

What if my document gets lost in transit?
Contact Mail Plus if you shipped through us. We can assist in filing a claim or tracking inquiry. Carriers typically require a tracking number and proof of value.

How much does it cost to mail documents from St. Thomas?
Prices vary by weight, speed, and destination. USPS rates for flat-rate envelopes start around $9, while FedEx and DHL rates depend on distance and urgency. We can quote exact prices in-store.