Sleeve the card
A raw card should first go into a clean penny sleeve or appropriate inner sleeve. Make sure the card is fully seated and that no corner catches on the sleeve opening.
For thicker cards, use a sleeve designed for the card's thickness rather than forcing it into a standard sleeve.
Add rigid support
Use a correctly sized top loader, semi-rigid, or other rigid holder. The purpose is to prevent bending and corner impact during automated handling.
A holder that is too large can let the card move; one that is too tight can damage edges.
Close the opening safely
A team bag or resealable outer sleeve keeps the card from sliding out of the rigid holder. If tape is used, keep adhesive away from the card itself and make the package easy for the buyer to open without tools near the card.
Immobilize the holder
Add a rigid shipping protector, cardboard sandwich, or purpose-built card protector so the holder cannot flex or bounce around inside the envelope or mailer.
For multiple cards, avoid creating uneven pressure points.
Choose the outer package
Use an envelope or mailer that fits the protected card without excessive empty space. Higher-value cards, slabs, and thicker packages generally justify more rigid and trackable shipping methods.
Carrier rules, machinability standards, insurance options, and postage requirements change, so verify the current service rules before mailing.
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