Customs Declarations with ShipByMail: What You Need to Know Before You Ship

When shipping from Canada to the US or internationally, your shipping journey doesn’t start at the post office — it starts with a proper customs declaration. With ShipByMail, we guide you through each step to help you avoid unnecessary delays or customs issues.

In this guide, we’ll break down what a customs declaration is, how ShipByMail helps you manage it, and what you can customize — including declaring your own item value — before your parcel ships.

What Is a Customs Declaration and Why Does It Matter?

Every international shipment from Canada must include a customs declaration. This document tells border officials:

• What’s inside the package
• Its value in CAD or USD
• Country of origin
• Destination details

This information helps customs authorities determine:

• Whether duties or taxes apply
• If the item meets import regulations
• Whether the shipment should be held for inspection

Providing clear and accurate information is critical. If customs finds inconsistencies, they may delay, reject, or return your parcel — and you could be charged extra fees.

How ShipByMail Handles Customs Declarations

At ShipByMail, we make customs declarations simple by pre-filling the form using:

• Your uploaded invoice or receipt
• Product details like value, item type, and origin
• Your selected shipping method and destination

But here’s the key: you always have the final say.

Before you check out, you’ll have the option to:

• Edit the item description (for clarity or compliance)
• Adjust the declared value
• Add any special handling notes

⚠️ Keep in mind that customs agencies may request proof of value. Declaring significantly lower values than your invoice can lead to fines, extra duties, or shipment delays.

Why Declared Value Matters

Your declared value isn’t just for taxes — it’s used for:

• Customs duties in the destination country
• Insurance coverage (for loss or damage during shipping)
• Customs risk evaluation

Choosing the right value is about balance: You want to avoid overpaying in duties, but also ensure you’re covered in case of loss or damage. ShipByMail empowers you to decide what makes sense for your shipment.

Tips to Avoid Customs Issues

To streamline your delivery and avoid red flags at customs, follow these guidelines:

• Upload a valid invoice with your item’s full purchase details
• Use specific item names (“Bluetooth speaker” vs. “electronics”)
• Declare a realistic value (aligned with the invoice if possible)
• Avoid restricted or prohibited items
• Choose a shipping method that matches your urgency and budget

Need help? Our How It Works page walks you through the full process.

FAQ: Customs Declarations with ShipByMail

Q: Can I change the declared value of my item?

A: Yes, you can update the declared value at checkout before your shipment leaves our facility. Just ensure it aligns with what you’d feel comfortable explaining to customs if asked.

Q: What happens if I skip uploading an invoice?

A: We strongly recommend uploading an invoice. Without it, your shipment may be delayed or declared at a default value, which could increase duties or trigger inspection.

Q: Are customs duties included in the shipping fee?

A: No. Customs fees and import taxes are charged by the destination country and are typically paid by the recipient upon delivery.

Q: Is it illegal to declare a lower value than I paid?

A: It’s not illegal to adjust the declared value, but you must be aware of the risks. Customs can request documentation, and if they find a discrepancy, they may revalue the item or charge penalties.

Q: What if I made a mistake after submitting my declaration?

A: If your item hasn’t shipped yet, you can contact support or open a ticket to request a correction.

Conclusion: Ship Smarter and Stay Compliant

With ShipByMail, you’re in control of your customs declaration — but you’re never alone. Our dashboard helps you upload your invoice, adjust your value if needed, and ensure every package has the correct information to cross borders quickly and legally.

Need help shipping from Canada to the US or worldwide?
Register today and start shipping confidently with ShipByMail.