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The proven method is case-in-box: detune the strings to ease tension off the neck, brace the headstock inside a hard case so it cannot move, fill every void, then put the case inside a larger box with cushioning on all sides. One note: LetterAgent labels are Canada-only Xpresspost capped at 5 kg, and a boxed guitar exceeds that, so use a regular carrier.
| Step | What to do | Why |
|---|---|---|
| Detune the strings | Loosen each string a whole step or more | Full string tension plus a shipping impact can crack the neck or headstock |
| Brace the headstock | Crumpled paper or foam under and around the headstock inside the case | Headstock breaks are the number one shipping injury for guitars |
| Immobilize inside the case | Fill every gap around the body and neck so nothing shifts | Movement inside the case causes finish wear and stress fractures |
| Box the case | Hard case inside a larger corrugated box, 2 inches of cushioning all around | The outer box absorbs the impacts the case alone cannot |
A tuned guitar holds a surprising amount of tension across the neck, often compared to the weight of a person hanging from it. In normal life the neck is built for that load. But a sharp impact during shipping, a drop off a conveyor, a stack shifting in a truck, momentarily adds to that tension, and the headstock joint is the weak point. Detuning a step or two unloads the neck enough to give it some slack. Do not remove the strings entirely on most guitars: zero tension lets the neck relax into a back-bow and the truss rod then works against nothing, which creates its own setup problem at the other end.
Not safely on its own. A gig bag protects against scratches and rain, not against the crushing and puncture forces of a parcel network. If a gig bag is all you have, it can work as the inner layer: guitar in the gig bag, gig bag inside a proper box with the voids filled. But a gig bag taped shut and handed to a carrier is asking for a cracked headstock. For anything valuable, buy or borrow a hard case first; it is cheaper than the repair.
Electric guitars have a small advantage here: no delicate soundboard bracing to crack, and solid bodies tolerate knocks better than hollow acoustics. They still break at the headstock, so the bracing step is not optional for electrics either. Remove the strap, the cable, and anything in the case pocket that could rattle loose; a loose capo bouncing around inside the case will happily dent a finish.
Guitar shipping boxes exist for a reason: they are long, narrow, and double-walled. Music stores will often give or sell you one if you ask nicely. Place the closed hard case in the box with cushioning (bubble wrap, foam, or tightly crumpled paper) filling every side, especially the ends. The case should not be able to slide at all when you tip the box. Tape the box with the H-method: one strip down the center seam and strips across both ends, so no single seam can pop.
Mark the box "fragile" and "this side up" if you like, but do not rely on it. Sorting facilities are automated, and handlers see thousands of fragile stickers a day. Good packing is the protection; the sticker is a wish.
Buy declared-value coverage for anything you could not afford to replace. Photograph the guitar, the case interior packing, and the sealed box before drop-off: carriers ask for packing evidence on damage claims, and "the box looks fine but the headstock snapped" claims get denied when the packing cannot be shown. Declare the real current value, not the price of a new equivalent.
Temperature deserves a line because guitars are wood under tension. A parcel sitting in a freezing truck or a hot warehouse can cause finish checking (fine cracks in the lacquer) on nitrocellulose finishes, common on many electrics. Let the guitar acclimate in its case for several hours after delivery before opening it in a warm room: the slow temperature change is much kinder than the shock.
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