The following is quoted from FedEx.com on regarding additional surcharges related to handling, packaging, address corrections, delivery area, etc.
Your shipment may incur fees in addition to its base rate. The following are descriptions of those fees plus other shipping information. See the FedEx Express Terms and Conditions and FedEx Ground Tariff for more information. See p. 67 in the FedEx Service Guide for information on the fees that may apply to FedEx One Rate® shipments. Separate fees apply for FedEx SameDay® and FedEx® International Next Flight. FedEx Express® shipments from the U.S. to Puerto Rico are assessed the same fees that apply to FedEx Express shipments within the U.S., unless otherwise specified
Elevate customers most regularly incur Additional Handling Surcharges and Delivery Area Surcharges. The specifications for these surcharges is outlined in more detail below. These outlines are provided as a convenience and are not guaranteed to reflect any recent changes, which can happen often with the current shipping situation. Please refer to the full documentation for current surcharge information.
Link: Full Surcharge Documentation
Link: Peak Surcharges, Peak Surcharges Solutions Article
Additional Handling
A surcharge applies to any package that:
Dimension - $16 per package + Peak Surcharges
1) measures greater than 48 inches along its longest side;
2) measures greater than 30 inches along its second-longest side;
3) measures greater than 105 inches in length and girth — the length and girth is length plus (two times the height) plus (two times the width);
Weight - $25.50 per package + Peak Surcharges
4) • has an actual weight greater than 50 lbs. (U.S. Express Package Services, U.S. Ground Services); • has an actual weight greater than 70 lbs. (International Express Package Services, International Ground Service);
Packaging - $14 per package + Peak Surcharges
Is in non-standard packaging, including any package that:
5) is not fully encased in an outer shipping container;
6) is encased in an outer shipping container not made of corrugated fiberboard (cardboard) materials, including but not limited to metal, wood, canvas, leather, hard plastic, soft plastic (e.g., plastic bags) or expanded polystyrene foam (e.g., Styrofoam);
7) is encased in an outer shipping container covered in shrink wrap or stretch wrap;
8) is encased in a soft-sided pack (e.g., courier packs, poly bags and bubble mailers) that exceeds 18 inches along its longest side or 13 inches along its second-longest side or 5 inches in height;
9) is cylindrical, including (without limitation) mailing tubes, cans, buckets, barrels, drums or pails;
10) is bound with metal, plastic or cloth banding, or has wheels, casters, handles, or straps (including packages where the outer surface area is loosely wrapped, or where the contents protrude outside the surface area); or
11) could become entangled in or cause damage to other packages or the FedEx sortation system.
Package shape and dimensions may change during transit, which can affect the package’s dimensional weight and surcharge eligibility. If the dimensions change during transit, FedEx may make appropriate adjustments to the shipment charges at any time. For U.S. express and ground services, this surcharge applies per piece even if multiple pieces are bundled in a shipment. We reserve the right to assess additional handling charges for packages that require special handling or that require FedEx to apply additional packaging during transit
Peak — Additional Handling Surcharge
During specified times of the year, the Peak — Additional Handling Surcharge will apply to packages meeting the criteria and characteristics of the Additional Handling Surcharge (see above).
Go to fedex.com/peak-surcharge for information on peak surcharges in effect, including applicable services, surcharge amounts and effective dates
Address Correction
Express
If the shipper provides an incomplete or incorrect recipient address, we may attempt to find the correct address and complete delivery. We may use the address included in the shipper’s electronic shipment information to determine whether an address correction is necessary. We will assess a shipping fee. For shipments receiving FedEx Express Multiweight® pricing, the fee is $18 per package up to a maximum of $126 per shipment. Address correction is also required if the recipient phone number is omitted for a Rural Delivery (RD) address or a Star Route Assignment (SRA) address in Alaska. If we are unable to complete delivery, we are not liable for failing to meet our delivery commitment.
Within the U.S., we also will assess this fee if the address is a P.O. box number or P.O. box ZIP code. For international shipments destined to a P.O. box address, we may assess the fee if a valid telephone, fax or telex number is not provided for the recipient.
For FedEx International Broker Select,® the address correction fee will apply if the broker’s address is incomplete or incorrect on the air waybill or other shipping documentation. If we cannot determine the correct address or cannot reach the broker, we may attempt to contact the sender for address clarification or instructions to return the shipment. If we are unable to complete delivery under these circumstances, we will not be liable for failing to meet our delivery commitment.
Ground
If the shipper provides an incomplete, incorrect or P.O. box recipient address, we may attempt to determine the correct address, complete delivery and notify the shipper of the address correction. We may use the address included in the shipper’s electronic shipment information to determine whether an address correction is necessary. We assess an additional charge for delivery or attempted delivery to the corrected address. For shipments receiving FedEx Ground Multiweight® pricing, the fee is $18 per package up to a maximum of $54 per shipment. The money-back guarantee does not apply to these shipments, and we are not liable for failing to complete delivery or meet our scheduled delivery time
Delivery Area Surcharge
A delivery area surcharge applies to package shipments destined to select U.S. ZIP codes. In addition, a delivery area surcharge applies to FedEx Express and FedEx Ground shipments destined for areas in Alaska and Hawaii that are remote, sparsely populated or geographically difficult to access.
Go to FedEx.com (DAS Zip Codes) for a list of ZIP codes where this surcharge applies.
A maximum charge may apply for shipments receiving FedEx multiweight pricing. For FedEx Ground and FedEx Home Delivery packages that exceed 70 lbs. and are destined to an Alaska ZIP code that receives the delivery area surcharge, the applicable fee will be 3.5 times the Alaska commercial or Alaska residential charge. Delivery times are extended by 2–5 days (based on location) to Alaska ZIP codes that are assessed this surcharge.