A crawlspace call becomes much easier to route when you can describe the access opening, approximate height and whether the source appears visible from the entry.
01 / Clearance
“There is a crawlspace” does not describe access.
Some crawlspaces have a full-height door and a relatively clear path. Others have a small foundation opening, low joists, ductwork, plumbing, vapor barrier, piers or stored material in the way. Take a photo of the entry if doing so is easy and safe; you do not need to crawl inside to document the problem.
02 / Source
Use the rooms above to help narrow the area below.
Note where odor is strongest indoors and whether the suspected area lines up with a bathroom, kitchen, utility penetration, fireplace, deck connection or another structural feature. That context can reduce unnecessary searching underneath the house.
If you cannot see the carcass from the opening, say that. The request should distinguish a confirmed visible animal from a suspected source based on odor.
03 / Conditions
Moisture and ground conditions can affect the approach.
Standing water, active leaks, mud, sharp debris, electrical concerns or very low clearance are not side notes. They can change whether the area can be entered safely and whether another issue needs to be addressed before or alongside removal.
04 / Scope
Ask what is included around the removal point.
For an accessible carcass, the immediate work may be simple. If residue affected soil, a vapor barrier, insulation or another material, ask what the provider intends to remove, clean or leave in place and why.
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